Hydrogen gas has a density of 0.09 , and at normal pressure and 1.01 one mole of it takes up 22.4. How would you calculate the moles in 770 of hydrogen gas?

Answer : The moles of hydrogen gas will be, 201.9 moles

Solution :

First we have to calculate the molar mass of hydrogen gas.

using ideal gas equation,

where,

n = number of moles of gas

w = mass of gas

P = pressure of the gas = 1 atm

T = temperature of the gas =

M = molar mass of hydrogen gas = ?

R = gas constant = 0.0821 Latm/moleK

D = density of gas  = 0.090 g/L

Now put all the given values in the above equation, we get the molar mass of hydrogen gas.

Now we have to calculate the moles of hydrogen gas.

Therefore, the moles of hydrogen gas is, 201.9 moles

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.