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a) mK = 39
39g K --- 1 mol H2
117g --- x
39x = 117
x = 3 mol H2
b) mK = 39g
mH2 = 2*1g = 2g
39g K --- 2g H2
117g K --- x
39x = 2*117
39x = 234
x = 6g H2
c) 39g K --- 6,02 * 10²³ cząsteczek H2
117g K --- x
39x = 117 * 6,02 * 10²³
x = 18,06 * 10²³ cząsteczek H2
d) 39g K --- 22,4 dm³ H2
117g K --- x
39x = 22,4 * 117
x = 67,2 dm³ H2
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