Answer:
(a) 1
molecule of hydrogen gas contains 2 atoms of hydrogen
1 dozen of molecules = 24 atoms of H
6.022 x 1023
molecules of Ha =1 mol
12 molecules
ofmoles
6.022 x1023
= 1.99 x10-23 moles
(b) Hydrogen
: Oxygen (by mass)= 1: 8
= 2 g : 16
got oxygen
1 mole of combines withmole of oxygen mole combines with oxygen moles = 2 : 1
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