molar mass of water is 18 g what is the mass of 1 mole of water
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helium .Why? 3. What is the mass of 0.2 moles of oxygen molecules?
1- 18x1 eq 18
2- 0.2 x molarmass of o2 i.e 16
3. No. of moles = Given mass/Total mass of an atom
No. of moles=0.2
Mass of an oxygen atom = 16 a.m.u
So,
0.2 = required mass/16
Required mass = 0.2×16
Required mass = 3.2 a.m.u
1- 18x1 eq 18
2- 0.2 x molarmass of o2 i.e 16
3. No. of moles = Given mass/Total mass of an atom
No. of moles=0.2
Mass of an oxygen atom = 16 a.m.u
So,
0.2 = required mass/16
Required mass = 0.2×16
Required mass = 3.2 a.m.u
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