Do the following calculation and write the answer in proper number of significant figures 78.025 + 2 =

Do the following calculation and write the answer in proper number of significant figures 45.56 – 40.34

Identify the name of the following molecule Na2S

Identify the name of the following molecule CO2

In the paper chromatography experiment, you marked the line on chromatography paper with a pencil, the reason for this is.

Which of the following number has 4 significant figures?

Identify the name of the following molecule FeCl2

Identify the name of the following molecule Fe2O3

A student measured a a volume of liquid as 76.82 mL, and later found out it was 75.82 mL. Calculate the percent error

Identify thenumber of significant figures in thefollowing number 65200.080