Which of the following has the greatest mass? (R.A.M: H, 1; C, 12; N, 14; O, 16; Na, 23; S, 32; K, 39; Pb, 207)
A 0.5 mol NaOH
B 0.4 mol Na2CO3
C 0.3 mol K2SO4
D 0.2 mol Pb(NO3)2
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The answer is D with 66.2g. A = 20g, B = 42.4g, C = 52.2g
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