Given 2.05 mol Hg find mass Hg

2.05 mol Hg x 200.59g Hg / 1 mol Hg =411g Hg
My question is would my answer be wrong if I put it in scientific notation 4.11E2

no not unless the teacher says your not allowed too

Unless your class is using the E notation for scientific notation I would use the 10 power as

4.11 x 10^2 g

don't forget the units and, yes, I agree 3 sig figs are appropriate here.

No, your answer would not be wrong if you wrote it in scientific notation as 4.11E2. In scientific notation, the number is expressed as a decimal number between 1 and 10 multiplied by a power of 10. In this case, 4.11 is the decimal number and E2 indicates that it should be multiplied by 10 raised to the power of 2, which is 100. Therefore, 4.11E2 in scientific notation is equivalent to 411.

So, whether you write the answer as 411g or 4.11E2g, it represents the same value and is correct.