Question

Ajutați-mă va rog frumos
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Answer 1

Răspuns:

1

a)1 mol de Mg....24g Mg

2 moli de Mg....x g Mg

x=2×24=48g Mg

b) 1 mol de S....32 g S

0.1 moli S.......y g S

y=32×0.1=3.2 g S

2

a) 1 mol Al... 27g Al

x moli Al.....2.7 g Al

x=2.7:27=0.1 moli Al

b)1 mol Na....23 gNa

y moli Na.....46g Na

y=46:23=2moli Na

3

1 mol Ca....40 g Ca

x moli Ca.....10g Ca

x=10:40=0.25 moli Ca

1 mol Ca........6.022×10²³ atomi

0.25 moli Ca......x atomi

x=0.25×6.022×10²³

4

1 mol Ag....108g.....6.022×10²³atomi

x g.........1 atom

x=108:6.022×10²³