midterm review 3
Flashcard
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does accuracy measure in scientific terms?
Back
Accuracy measures how close your answer is to the correct or accepted answer.
2.
FLASHCARD QUESTION
Front
What is the charge of a cation?
Back
A cation has a positive charge.
3.
FLASHCARD QUESTION
Front
What is the term for atoms of the same element with different mass numbers?
Back
These are called isotopes.
4.
FLASHCARD QUESTION
Front
How do you calculate percent error?
Back
Percent error = |(Experimental Value - Theoretical Value)| / Theoretical Value x 100%.
5.
FLASHCARD QUESTION
Front
What is the percent error for the density of iron if the experimental value is 7.75 g/mL and the theoretical value is 7.86 g/mL?
Back
The percent error is 1.4%.
6.
FLASHCARD QUESTION
Front
How should the answer to the calculation (8.314)(3.160) be recorded in terms of significant figures?
Back
The answer should be recorded as 26.27.
7.
FLASHCARD QUESTION
Front
What is a significant figure?
Back
A significant figure is any non-zero digit, any zeros between significant digits, and any trailing zeros in a decimal.
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