Chemistry Review - Unit Conversion & Significant Figures

Front

Significant figures are the digits in your number that _____

Back

you actually know

Front

Which type of number can be counted, like the number of eggs in a dozen?

Back

exact numbers

Front

Determining significant figures gets much simpler when you use _____

Back

scientific notation

Front

Which type of number is estimated to a certain number of sig figs, like a car's speed?

Back

measured numbers

Front

For addition or subtraction, the number of sig figs in the answer is determined by _____

Back

the number with the fewest figures after the decimal point

Front

What is the purpose of significant figures in measurements?

Back

To convey the precision of a measurement.

Front

How do you determine the number of significant figures in a number like 0.00456?

Back

Count all non-zero digits and any zeros between them; this number has 3 significant figures.

Front

What is scientific notation?

Back

A way to express numbers as a product of a number between 1 and 10 and a power of 10.

Front

Convert 2500 to scientific notation.

Back

2.5 x 10^3

Front

What is the rule for significant figures in multiplication and division?

Back

The answer should have the same number of significant figures as the measurement with the fewest significant figures.