Answer the following question: Express the following numbers to 3 Signigicant Figures?

Question

1. 11450067 mm^3
2. 12.0058 cm^3
3. 24.251 g
4. 1.845 x 10^3 kg
5. 10.868 g
6. 0.00030506 mol
7. 1.560 mL
8. 11.35000 g
9. 35.3 nm

Answer 1

sig fig is a way of getting you to understand how much confidence you have in the number that you are dealing with (or should i say came up with in lab)

You should remember first that if you have zero in between numberals, there is a good chance that the last few numbers arent very important

so lets see

1. 1.15 x 10^7
2. 12.0
3. 24.3
4. 1.85 x 10^3
5. 10.9
6. 3.05 x 10^-4
7. 1.56
8. 11.4
9. 35.3

hows that. each number ends up with the three most important numbers to express the values provided.

Answer 2

I would do the homework yourself, but here's a clue: all zeros to the left are NOT significant. All zeros in between two numbers ARE significant. All zeros to the right ARE significant if there's a decimal point. ie 0.0002 has 1 sig fig; 1.0000004 has 8 sig figs; 100.00 has 5 sig figs; however, 100 has 1 sig fig. To solve your problem, simply round each number to 3 sig figs based on the items above.