When you use the answer of, say part a to calculate part b, do you use the rounded off answer or the answer that hasn't been rounded off (which is on your calculator)?

When you are answering a question where you have to read a value off a graph, how many decimal places or significant figures should you give it to? Would it be the number of signi …

This question arises because the Data Booklet for the VCE Chemistry exams gives atomic weights of atoms with 1 decimal place and, so, H is given as 1.0 g/mol. Does this mean that …

Do we need to consider significant figures in physics like we do in VCE chemistry. Or, will they specify a number of decimal places instead?

When there are sub parts to questions (for example: 1a, 1b, etc), do we consider the number of significant figures to clip our answers to from the data given up until that point, a …

0.360 and 3.60 x 10-1 both have the same number of significant figures right? So why do we use the second form?

Occasionally, in answering a question, a textbook chemist may convert his or her answer out of SI units for the final answer. My problem is that this can often mean a very differe …

Question: Determine the percentage composition of the following compound: lead(IV) oxide PbO2 Although I got the 'right' answer, I had put it to the wrong number of 'significan …