How many molecules are there in 14g of nitrogen gas at s....
How many molecules are there in 14g of nitrogen gas at s.t.p? (n = 14, Avogadro Number = 6. 0 x 1023mol-1)
1.2 x 10 23
3.0 x 1023
6.0 x1023
1.2 x 1024
30 x1023
Correct answer is B
mass of nitrogen gas = 14g, molar mass of nitrogen gas = 28gmol-1
mole = massmolarmass=noofparticlesavogadro′sno
moles = 1428=noofparticles6.0×1023
no of molecules = 0.5 x 6.0 x 1023
= 3.0 x 1023molecules.
What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen? ...
The decarboxylation of ethanoic acid will produce carbon (IV)oxide and ...
Crude copper can be purified by the electrolysis of CuSO4(aq) if?...
When magnesium ribbon burns in air, the products are...
The formation of ethene from dehydration of ethanol can be described as------- ...
The oxidation state of sulphur on H2SO4 acid is ...
Hydrogen can be displaced from a hot alkaline solution by ...
Which of the following is not a naturally occurring iron ore? ...