Which of the following has the largest mass?

0 ⤊

A. 5.0 mol H2o
B. 3.5 mol NH3
C. 8.0 mol C
D. 6.0 mol C2H2

2007-04-10 18:21:40 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

H2O ... 2+16 ... 18*5 = 90
NH3 ... 14+3 ... 17*3.5 = 59.5
C ... 12 ... 12*8 = 96
C2H2 ... 24+2 ... 26*6 = 156

Answer is D

2007-04-10 18:33:55 · answer #1 · answered by ecolink 7 · 0⤊ 0⤋

Mass = no of moles x molecular weight of compound

Now work out the molecular weights for , H2O, NH3, C and C2H2 and sub in the formula above

2007-04-10 18:37:01 · answer #2 · answered by Mr Hex Vision 7 · 0⤊ 0⤋

6 moles of acetylene has the largest mass, 136 grams. The water, at 90 grams is second.

2007-04-10 18:37:43 · answer #3 · answered by Joe 5 · 0⤊ 0⤋

2007-04-10 21:22:29 · answer #4 · answered by Norrie 7 · 0⤊ 0⤋