Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chem Chap 2 Sec 3

Using Scientific Measurements

QuestionAnswer
The closeness of measurements to the correct or accepted value of the quantity measured Accuracy
The closeness of a set of measurements of the same quantity made in the same way Precision
Calculated by subracting teh accepted value from teh experimental value, dividing the diference by the accepted value & then multiply by 100 Percentage error
When does the percentage error have a negative value if the accepted value is greater than the experimental value
When does the percentage error have a positive value If the accepted value is less than the experimental value
Consist of all the digits known with certainty plus one final digit, which is somewhat uncertain or is estimated Significant figures
The significance of zeros iin a number depens on their location
Significant or not: Zeros appearing between nonzero digits Significant
Significant or not; Zeros appearing in front of all nonzero digits Not significant
Significant or not: Zeros at the end of a number and to the right of a decimal point significant
Significant or not: Zeros at the end of a number but to the left of a decimal point May or may not be significant
Rules to rounding: Digit after the last digit to be retained is greater than 5 imcrease by 1
Rules to rounding: Digit after teh last digit to be retained is less than 5 stay the same
rules to rounding: Digit after the last digit to be retained is 5 followed by nonzero increase by 1
rules to rounding: Digit after the last digit to be retained is 5 not followed by nonzeros an preceeded by an odd number increase by 1
rules to rounding: Digit after the last digit to be retained is 5 not followed by nonzeros an preceeding significant digit is even Staty the same
Created by: tbstinso
Popular Chemistry sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards