Question

Answer the folowing questions for 0.05mol of H2S?
a) how many grams does it weight?
b) how many grams of hydrogen does it contain?
c) how many grams of sulfur does it contain?
d) how many molecules doesit contain?

Answer 1

a)nr moli = masa/masa molara => masa = 0,05*34 = 1,7 g
b)1 mol H2S.........2 g H
0,05 moli H2S.........x g H
x = 0,1 g H
c)1 mol H2S.........32 g S
0,05 moli H2S..........x g S
x = 1,6 g S
d)1 mol H2S........6,023 * 10 la 23 molecule
0,05 moli H2S...............x molecule
x = 3,0115 * 10 la 22 molecule