Biology
Chemistry
AP Chemistry
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AP English Literature
AP Chemistry
Dec 7, 2025
58
6 pages
Ever wondered how scientists figure out exactly what stuff is made of? In chemistry, understanding the composition of... Show more
Mass spectroscopy helps chemists identify the isotopes of an element and determine how common each one is. When you see those decimal atomic masses on the periodic table (like chlorine's 35.45), that's actually an average of all its naturally occurring isotopes!
To calculate the average atomic mass from a mass spectrum, multiply each isotope's mass by its relative abundance, then add all these values together. For example, chlorine has two main isotopes Cl-35 (77% abundant) and Cl-37 (23% abundant). When you do the math (35 × 0.77) + (37 × 0.23) = 35.46.
You can also identify elements from their mass spectra. For instance, if you see peaks at masses 39, 40, and 41 with relative abundances of 90%, 2%, and 8%, calculating the average mass gives you 39.18—that's potassium! For isotopes like Germanium-74, you can determine the number of neutrons by subtracting the proton number (32) from the mass number (74), giving 42 neutrons.
Pro Tip On the AP exam, expect three types of mass spectroscopy questions estimating atomic mass from a spectrum, identifying elements from their spectrum, or identifying specific isotopes. Practice these calculations to build confidence!
Pure substances have a fixed composition—every sample of water (H₂O) contains exactly 11.11% hydrogen and 88.89% oxygen by mass. This consistency is what makes chemistry predictable!
Calculating percent composition is a three-step process First, multiply the number of atoms by their atomic mass. Second, find the total formula mass by adding these values. Finally, divide the mass of each element by the total mass and multiply by 100. For example, with sucrose (C₁₂H₂₂O₁₁), carbon makes up 42.10%, hydrogen 6.49%, and oxygen 51.40%.
The difference between empirical and molecular formulas is super important. The empirical formula shows the lowest whole-number ratio of atoms (like CH₂O), while the molecular formula shows the actual number of atoms (like C₆H₁₂O₆ for glucose). Different compounds can have the same empirical formula but different molecular formulas—yet they'll have identical percent compositions by mass!
Remember This Compounds with the same empirical formula always have the same percent composition by mass, even if their molecular formulas differ. This concept frequently appears on tests!
Converting between compounds and their empirical formulas can simplify complex molecules. For example, glucose (C₆H₁₂O₆) and formaldehyde (CH₂O) have the same empirical formula (CH₂O), meaning they share identical percent compositions by mass.
To determine an empirical formula from mass data, follow these steps First, convert the mass of each element to moles. Second, divide each value by the smallest number of moles. Third, use these mole ratios to write the chemical formula. For example, if you have 13.5g calcium, 10.8g oxygen, and 0.675g hydrogen, converting to moles and finding the ratio gives Ca₁H₂O₂, which can be written as Ca(OH)₂.
When working with percentage composition, treat the percentages as grams (43.6% P means 43.6g P in 100g of compound). Convert these values to moles, find their ratio, and then multiply to get whole numbers if needed. For instance, a compound with 43.6% P and 56.4% O has an empirical formula of P₂O₅.
Chemistry Hack When finding empirical formulas, always double-check your math by ensuring the percentages add up to 100% (or close to it due to rounding). This simple verification can catch many common errors!
When solving complex percentage composition problems, organization is key. For a compound containing 28.7% K, 1.5% H, 22.8% P, and 47.0% O, convert each percentage to moles, find the ratio, and you'll discover the empirical formula is KH₂PO₄—a compound you might recognize as potassium dihydrogen phosphate.
The AP Exam typically features three types of empirical formula problems. The first type provides straightforward mass or percentage composition data. For example, a 23.0g sample containing 12.0g C, 3.0g H, and 8.0g O yields an empirical formula of C₂H₆O when converted to moles and simplified.
The second type involves combustion analysis, where a hydrocarbon is burned in oxygen to produce CO₂ and H₂O. By measuring these products, you can work backward to determine the original compound's formula. The third type deals with hydrate analysis, which involves heating a hydrated ionic solid to determine how many water molecules are attached to each formula unit.
Test Prep Alert When working with empirical formula problems, always be careful with your units! Converting grams to moles is the most common stumbling point for students, so double-check your conversions using the periodic table.
Mixtures contain two or more pure substances—either elements, compounds, or both. Unlike pure substances, a mixture's composition can vary depending on how much of each component is present. Solutions, like salt water, are important mixtures we encounter daily.
Distinguishing between mixtures and pure substances is crucial. A mixture of two elements (like X and Z atoms) appears as separate atoms or molecules. Pure substances, on the other hand, have fixed ratios of atoms joined through chemical bonds, like in compounds (XZ₂) or pure elements (Z₂). Mixtures can also contain both elements and compounds together.
Elemental analysis helps determine the relative amounts of pure substances in a mixture. For example, if a 2.4g mixture of CaCl₂ and NaCl contains 0.12g of sodium, we can calculate that the sample is 13% NaCl. The process involves converting the mass of sodium to moles, determining the moles of NaCl, converting to grams, and finally calculating the percentage.
Real-World Connection Elemental analysis isn't just for chemistry class—forensic scientists use these techniques to analyze evidence, environmental scientists test water and soil samples, and quality control experts ensure product purity. The skills you're learning have practical applications!
When analyzing mixtures, systematic problem-solving is essential. For a 5.0g mixture of calcium carbonate (CaCO₃) and silicon dioxide (SiO₂) containing 1.5g of calcium, you can determine it's 75% CaCO₃. The process involves converting calcium mass to moles, establishing the mole relationship to CaCO₃, converting back to grams, and calculating the percentage.
Molarity (M) is a key concept when working with solutions, defined as moles of solute per liter of solution. This concentration measure helps scientists prepare and analyze solutions precisely. Understanding molarity is crucial for lab work and many chemistry calculations.
When analyzing unknown mixtures, you can use changes in composition to identify what's happened. For instance, if a sample of glucose (C₆H₁₂O₆) has 40% carbon by mass, but a new measurement shows 38.2% carbon, water (H₂O) must have been added. This decreased the carbon percentage because water contains no carbon, effectively "diluting" the carbon content.
Problem-Solving Strategy When tackling mixture problems, always identify what you know, what you need to find, and which formulas connect them. Often, starting with the element you have data for and working backward is the most efficient approach!
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
2
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Covers Dalton's theory, dalton's work, discovery of the electron, the plum pudding model, Milkan's oil drop experiment, results of the nucleus
ChemistryFrom Democritus to the Wave-Mechanical Model, a historical overview of the development of atomic theory and the understanding of matter.
ChemistrySubatomic Particles
ChemistryScience notes about atoms
ChemistryWhat are significant figures, and how to use them?
Chemistryincludes, defining the atom, Daltons Atomic Theory, Structure of the Nuclear Atom, Isotopes, Properties of Subatomic Particles, Orbitals, Difference Between Atoms, Atoms of the first 10 elements, Natural Abundance % of isotopes
ChemistryApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Ever wondered how scientists figure out exactly what stuff is made of? In chemistry, understanding the composition of substances is crucial. Let's explore how to analyze elements, determine chemical formulas, and work with mixtures—skills you'll definitely need for tests and... Show more
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Mass spectroscopy helps chemists identify the isotopes of an element and determine how common each one is. When you see those decimal atomic masses on the periodic table (like chlorine's 35.45), that's actually an average of all its naturally occurring isotopes!
To calculate the average atomic mass from a mass spectrum, multiply each isotope's mass by its relative abundance, then add all these values together. For example, chlorine has two main isotopes: Cl-35 (77% abundant) and Cl-37 (23% abundant). When you do the math: (35 × 0.77) + (37 × 0.23) = 35.46.
You can also identify elements from their mass spectra. For instance, if you see peaks at masses 39, 40, and 41 with relative abundances of 90%, 2%, and 8%, calculating the average mass gives you 39.18—that's potassium! For isotopes like Germanium-74, you can determine the number of neutrons by subtracting the proton number (32) from the mass number (74), giving 42 neutrons.
Pro Tip: On the AP exam, expect three types of mass spectroscopy questions: estimating atomic mass from a spectrum, identifying elements from their spectrum, or identifying specific isotopes. Practice these calculations to build confidence!
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Pure substances have a fixed composition—every sample of water (H₂O) contains exactly 11.11% hydrogen and 88.89% oxygen by mass. This consistency is what makes chemistry predictable!
Calculating percent composition is a three-step process: First, multiply the number of atoms by their atomic mass. Second, find the total formula mass by adding these values. Finally, divide the mass of each element by the total mass and multiply by 100. For example, with sucrose (C₁₂H₂₂O₁₁), carbon makes up 42.10%, hydrogen 6.49%, and oxygen 51.40%.
The difference between empirical and molecular formulas is super important. The empirical formula shows the lowest whole-number ratio of atoms (like CH₂O), while the molecular formula shows the actual number of atoms (like C₆H₁₂O₆ for glucose). Different compounds can have the same empirical formula but different molecular formulas—yet they'll have identical percent compositions by mass!
Remember This: Compounds with the same empirical formula always have the same percent composition by mass, even if their molecular formulas differ. This concept frequently appears on tests!
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Converting between compounds and their empirical formulas can simplify complex molecules. For example, glucose (C₆H₁₂O₆) and formaldehyde (CH₂O) have the same empirical formula (CH₂O), meaning they share identical percent compositions by mass.
To determine an empirical formula from mass data, follow these steps: First, convert the mass of each element to moles. Second, divide each value by the smallest number of moles. Third, use these mole ratios to write the chemical formula. For example, if you have 13.5g calcium, 10.8g oxygen, and 0.675g hydrogen, converting to moles and finding the ratio gives Ca₁H₂O₂, which can be written as Ca(OH)₂.
When working with percentage composition, treat the percentages as grams (43.6% P means 43.6g P in 100g of compound). Convert these values to moles, find their ratio, and then multiply to get whole numbers if needed. For instance, a compound with 43.6% P and 56.4% O has an empirical formula of P₂O₅.
Chemistry Hack: When finding empirical formulas, always double-check your math by ensuring the percentages add up to 100% (or close to it due to rounding). This simple verification can catch many common errors!
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
When solving complex percentage composition problems, organization is key. For a compound containing 28.7% K, 1.5% H, 22.8% P, and 47.0% O, convert each percentage to moles, find the ratio, and you'll discover the empirical formula is KH₂PO₄—a compound you might recognize as potassium dihydrogen phosphate.
The AP Exam typically features three types of empirical formula problems. The first type provides straightforward mass or percentage composition data. For example, a 23.0g sample containing 12.0g C, 3.0g H, and 8.0g O yields an empirical formula of C₂H₆O when converted to moles and simplified.
The second type involves combustion analysis, where a hydrocarbon is burned in oxygen to produce CO₂ and H₂O. By measuring these products, you can work backward to determine the original compound's formula. The third type deals with hydrate analysis, which involves heating a hydrated ionic solid to determine how many water molecules are attached to each formula unit.
Test Prep Alert: When working with empirical formula problems, always be careful with your units! Converting grams to moles is the most common stumbling point for students, so double-check your conversions using the periodic table.
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Mixtures contain two or more pure substances—either elements, compounds, or both. Unlike pure substances, a mixture's composition can vary depending on how much of each component is present. Solutions, like salt water, are important mixtures we encounter daily.
Distinguishing between mixtures and pure substances is crucial. A mixture of two elements (like X and Z atoms) appears as separate atoms or molecules. Pure substances, on the other hand, have fixed ratios of atoms joined through chemical bonds, like in compounds (XZ₂) or pure elements (Z₂). Mixtures can also contain both elements and compounds together.
Elemental analysis helps determine the relative amounts of pure substances in a mixture. For example, if a 2.4g mixture of CaCl₂ and NaCl contains 0.12g of sodium, we can calculate that the sample is 13% NaCl. The process involves converting the mass of sodium to moles, determining the moles of NaCl, converting to grams, and finally calculating the percentage.
Real-World Connection: Elemental analysis isn't just for chemistry class—forensic scientists use these techniques to analyze evidence, environmental scientists test water and soil samples, and quality control experts ensure product purity. The skills you're learning have practical applications!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
When analyzing mixtures, systematic problem-solving is essential. For a 5.0g mixture of calcium carbonate (CaCO₃) and silicon dioxide (SiO₂) containing 1.5g of calcium, you can determine it's 75% CaCO₃. The process involves converting calcium mass to moles, establishing the mole relationship to CaCO₃, converting back to grams, and calculating the percentage.
Molarity (M) is a key concept when working with solutions, defined as moles of solute per liter of solution. This concentration measure helps scientists prepare and analyze solutions precisely. Understanding molarity is crucial for lab work and many chemistry calculations.
When analyzing unknown mixtures, you can use changes in composition to identify what's happened. For instance, if a sample of glucose (C₆H₁₂O₆) has 40% carbon by mass, but a new measurement shows 38.2% carbon, water (H₂O) must have been added. This decreased the carbon percentage because water contains no carbon, effectively "diluting" the carbon content.
Problem-Solving Strategy: When tackling mixture problems, always identify what you know, what you need to find, and which formulas connect them. Often, starting with the element you have data for and working backward is the most efficient approach!
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
2
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Covers Dalton's theory, dalton's work, discovery of the electron, the plum pudding model, Milkan's oil drop experiment, results of the nucleus
ChemistryFrom Democritus to the Wave-Mechanical Model, a historical overview of the development of atomic theory and the understanding of matter.
ChemistrySubatomic Particles
ChemistryScience notes about atoms
ChemistryWhat are significant figures, and how to use them?
Chemistryincludes, defining the atom, Daltons Atomic Theory, Structure of the Nuclear Atom, Isotopes, Properties of Subatomic Particles, Orbitals, Difference Between Atoms, Atoms of the first 10 elements, Natural Abundance % of isotopes
ChemistryApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Algebra
Calculus 1
Algebra 1
Overige