College Chemistry Flashcards


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1

which of the following is not true?

the amount of matter after a chemical reaction is more than the amount of matter before the reaction

2

which of the following is the correct order of the steps of the scientific method?

observations, hypothesis, experiment

3

a set of hypotheses that gives an overall explanation of a natural phenomenon, which can be modified over time is called a :

theory

4

which of the following is NOT true about a law?

it can be modified (changed)based on new information

5

express the number 0.000779 in scientific notation

7.79x10^-4

6

express 165,000 in exponential (scientific) notation

1.65x10^5

7

what is the product of (1x10^-4)(3x10^2)?

3x10^-2

8

we generally report a measurement by recording all of the certain digits plus the ---uncertain

first

9

how many significant figures are there in the number 0.0456?

3

10

the agreement of a particular value with the true value is called

accuracy

11

------- it reflects the reproducibility of a given type of measurement

precision