Science math (sigfigs), Metrics, and Density

How to convert grams to milligrams?

1×1000 (1g = 1000 mg)

How to convert grams to pounds?

lb = g/453.6

how to calculate density?

mass (g) / volume (cm³)

when calculating grams….

do not round, only write down what the exact numbers displayed are

density is…

how much space something takes up

mass is…

how heavy something is

how to convert cm to mm?

1×10 (1cm=10mm)

how to convert cm to in?

1× 0.393701 (1cm=0.393701in)

how to convert cm to microliter?

1×1000 (1cm = 1000 microliters)

how many significant figures are there in 74,447?

5

How many sig figs are there in 0.015?

2

Round 0.051829 to 2 sig figs, 3 sig figs, and 1 sig fig.

2 sig figs - 0.052

3 sig figs - 0.0518

1 sig fig - 0.05

When multiplying or dividing with sig figs, “least accurate” is defined by…

The least number of sig figs

0.38 × 1.26 calculated by the least number of sig figs or “least accurate”

0.48

3.56 / 0.85 calculated by the least number of sig figs or “least accurate”

4.2

When adding or subtracting, “least accurate” is defined by…

the least accurate PLACE VALUE

16.324 + 2.17 is calculated by the “least accurate” place value

18.49

0.357 - 0.03 is calculated by the “least accurate” place value

0.33

Scientific notation is defined by…

Moving the decimal to the right or left to get one number in front of it x 10 and the exponent is how many times you moved the decimal

express 1,236,840 in scientific notation

1.24 × 10^6

express 0.000238 in scientific notation

2.38 × 10^-4

When identifying for the sums or differences using sig figs and scientific notation where needed…

add or subtract the numbers with their exponents and then move the decimal over to put it in scientific notation and make it the least accurate place value

When expressing the following quotients using sig figs and scientific notation…

you multiply them and change to scientific notation and least number of sig figs