Question

what is the formula for percent by mass?

Answer 1

have you got a specific example to work with, or just the general idea?

Answer 2

a mixture contains 3.64g nacl,2.87g nh4cl,and 4.13g of sio2 what is the percent by mass of each compound in the mixture?

Answer 3

what's the mass of the whole mixture?

3.64g + 2.87g + 4.13g

Answer 4

10.849

Answer 5

sorry typo 1084g

Answer 6

what fraction of the whole is 3.64g of NaCl out of the whole mixture of 10.64g?

Answer 7

0.342

Answer 8

0.336

Answer 9

which one is it?

Answer 10

0.336

Answer 11

what did you get as the total mass? because i got 10.64g, not 10.84g

Answer 12

I had that but I put the number wrong on my paper and copied it.

Answer 13

so what's the percent if 3.42g of NaCl is part of 10.64g of total mixture?

34.2%

do the others the same way, and all 3 percentages should add up to 100%

Answer 14

thanks I am doing that now.