numbers unit chemistry

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

Convert 0.0003 to scientific notation.

Back

3 x 10^-4

Front

What is the conversion factor between milligrams and centigrams?

Back

1 mg = 0.1 cg, therefore 820 mg = 82 cg.

Front

How many significant figures are in the number 709.2?

Back

4 significant figures.

Front

Convert 490,000 grams to kilograms.

Back

490 kg.

Front

How many significant figures are in the number 0.020?

Back

2 significant figures.

Front

What is a significant figure?

Back

Digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in the decimal part.

Front

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

Back

Count all non-zero digits and any zeros between them; trailing zeros in a whole number without a decimal point are not significant.

Front

What is the purpose of scientific notation?

Back

To simplify calculations and comparisons of very large or very small numbers.

Front

How do you convert grams to kilograms?

Back

Divide the number of grams by 1000.