A sample of ammonium chloride decomposes on heating. Solid ammonium chloride -> ammonia gas + hydrogen chloride gas
A total of 2.4 x 1021 molecules of gas is formed.
How many hydrogen atoms are present in the gaseous products?
A 1.2 x 1021
B 2.4 x 1021
C 4.8 x 1021
D 9.6 x 1021

i dont know

explanation:

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.