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Chemistry
Oct 11, 2025
455
5 pages
A comprehensive guide to significant figures in measurements Chemistry and Physics, explaining rules, calculations, and practical applications.
This page outlines the key rules for determining significant figures in science, which are essential for accurate data reporting in chemistry and physics.
The main rules covered are
Highlight Zeros that act only as placeholders are not considered significant figures.
The page provides practice examples to apply these rules, such as
Example In the number 2,000, there is 1 significant figure, but in 2,000. (with a decimal point), there are 4 significant figures.
These examples reinforce the importance of understanding significant figures rules in various numerical contexts.
This page delves into how to perform calculations while maintaining the appropriate number of significant figures, a crucial skill in chemistry and physics.
The page covers two main operations
A. Adding and Subtracting with Significant Figures
Example 23.459 + 2.23 = 25.69 (not 25.689), as 2.23 has only two decimal places.
B. Multiplying and Dividing with Significant Figures
Example 2.50 x 17.3 = 43.3 (not 43.25), as both numbers have three significant figures.
The page also provides additional examples to illustrate these rules
Highlight When dividing, the number of significant figures in the quotient is determined by the number of significant figures in the dividend and divisor.
These examples reinforce the importance of applying significant figures rules in addition/subtraction and multiplication/division consistently in scientific calculations.
This page continues the discussion on performing calculations while adhering to significant figures rules in chemistry and physics.
The page begins to elaborate on addition and subtraction using significant figures
Highlight When adding or subtracting, the answer should have the same number of decimal places as the measurement with the least number of decimal places.
While the content on this page is limited, it sets the stage for more detailed explanations of how to apply significant figure rules in various mathematical operations. This understanding is crucial for maintaining the appropriate level of precision in scientific calculations and measurements.
Vocabulary Sig fig - A common abbreviation for significant figures used in scientific notation and calculations.
The proper application of significant figures in calculations ensures that the precision of the final result accurately reflects the precision of the original measurements, which is a fundamental principle in scientific data analysis and reporting.
This page provides extensive practice with significant figures rules multiplication and other operations.
Example Various calculation examples
Highlight In multiplication and division, the answer should have the same number of significant figures as the least precise measurement.
This page introduces the concept of significant figures in measurements and their importance in scientific data collection.
Key points covered
Definition Significant figures are digits in a measurement that are known with certainty and one estimated value.
The page provides examples of how to read measurements on different scales, emphasizing that
Highlight The estimated value always comes at the end of a measurement, and its place value depends on the instrument's scale.
For instance, with 1 cm increments, estimation is to the nearest 0.1 cm. With 0.1 cm increments, estimation is to the 0.01 cm.
Example A measurement of 3.0 cm includes a significant zero, as it represents an estimated digit in the tenths place.
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 โ all at your fingertips.
113
Smart Tools NEW
Transform this note into: โ 50+ Practice Questions โ Interactive Flashcards โ Full Mock Exam โ Essay Outlines
Types of chemical bonds, and intermolecular forces
ChemistryThis is about the development of the Atomic Models, atomic symbols and quantum number rules.
ChemistryExplore the principles of chemical equilibrium, including Le Chatelier's Principle and the factors affecting reversible reactions. This summary covers key concepts such as equilibrium constants, dynamic equilibrium, and the impact of concentration, pressure, and temperature changes on reaction shifts. Ideal for students studying chemistry concepts related to equilibria.
Chemistryhigh school chemistry course notes - unit 7: equilibrium (collision theory, heat of reaction, etc.)
ChemistryJohn Dalton's contributions to the model of the atom.
ChemistryThe objective of the experiment is to utilize the laboratory accurately to obtain the physical and chemical properties of water and to apply the physical methods of water purification.
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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve 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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve seen! Geometry too!
Paul T
iOS user
Chemistry
Oct 11, 2025
455
5 pages
A comprehensive guide to significant figures in measurements Chemistry and Physics, explaining rules, calculations, and practical applications.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page outlines the key rules for determining significant figures in science, which are essential for accurate data reporting in chemistry and physics.
The main rules covered are
Highlight Zeros that act only as placeholders are not considered significant figures.
The page provides practice examples to apply these rules, such as
Example In the number 2,000, there is 1 significant figure, but in 2,000. (with a decimal point), there are 4 significant figures.
These examples reinforce the importance of understanding significant figures rules in various numerical contexts.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page delves into how to perform calculations while maintaining the appropriate number of significant figures, a crucial skill in chemistry and physics.
The page covers two main operations
A. Adding and Subtracting with Significant Figures
Example 23.459 + 2.23 = 25.69 (not 25.689), as 2.23 has only two decimal places.
B. Multiplying and Dividing with Significant Figures
Example 2.50 x 17.3 = 43.3 (not 43.25), as both numbers have three significant figures.
The page also provides additional examples to illustrate these rules
Highlight When dividing, the number of significant figures in the quotient is determined by the number of significant figures in the dividend and divisor.
These examples reinforce the importance of applying significant figures rules in addition/subtraction and multiplication/division consistently in scientific calculations.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page continues the discussion on performing calculations while adhering to significant figures rules in chemistry and physics.
The page begins to elaborate on addition and subtraction using significant figures
Highlight When adding or subtracting, the answer should have the same number of decimal places as the measurement with the least number of decimal places.
While the content on this page is limited, it sets the stage for more detailed explanations of how to apply significant figure rules in various mathematical operations. This understanding is crucial for maintaining the appropriate level of precision in scientific calculations and measurements.
Vocabulary Sig fig - A common abbreviation for significant figures used in scientific notation and calculations.
The proper application of significant figures in calculations ensures that the precision of the final result accurately reflects the precision of the original measurements, which is a fundamental principle in scientific data analysis and reporting.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page provides extensive practice with significant figures rules multiplication and other operations.
Example Various calculation examples
Highlight In multiplication and division, the answer should have the same number of significant figures as the least precise measurement.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page introduces the concept of significant figures in measurements and their importance in scientific data collection.
Key points covered
Definition Significant figures are digits in a measurement that are known with certainty and one estimated value.
The page provides examples of how to read measurements on different scales, emphasizing that
Highlight The estimated value always comes at the end of a measurement, and its place value depends on the instrument's scale.
For instance, with 1 cm increments, estimation is to the nearest 0.1 cm. With 0.1 cm increments, estimation is to the 0.01 cm.
Example A measurement of 3.0 cm includes a significant zero, as it represents an estimated digit in the tenths place.
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 โ all at your fingertips.
113
Smart Tools NEW
Transform this note into: โ 50+ Practice Questions โ Interactive Flashcards โ Full Mock Exam โ Essay Outlines
Types of chemical bonds, and intermolecular forces
ChemistryThis is about the development of the Atomic Models, atomic symbols and quantum number rules.
ChemistryExplore the principles of chemical equilibrium, including Le Chatelier's Principle and the factors affecting reversible reactions. This summary covers key concepts such as equilibrium constants, dynamic equilibrium, and the impact of concentration, pressure, and temperature changes on reaction shifts. Ideal for students studying chemistry concepts related to equilibria.
Chemistryhigh school chemistry course notes - unit 7: equilibrium (collision theory, heat of reaction, etc.)
ChemistryJohn Dalton's contributions to the model of the atom.
ChemistryThe objective of the experiment is to utilize the laboratory accurately to obtain the physical and chemical properties of water and to apply the physical methods of water purification.
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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve 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 itโs very much worth it and youโll 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 donโt get it!!! In the end I think itโs worth it ๐๐ โ ๏ธAlso DID I MENTION ITS FREEE YOU DONโT HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLYโ๏ธโ๏ธโ ๏ธ
Thomas R
iOS user
Knowunity is the BEST app Iโve 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 help๐ค๐ค
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.๐๐ฉท๐
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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 Iโve seen! Geometry too!
Paul T
iOS user
