An unknown acid contains only hydrogen, chlorine and oxygen, the acid was analyzed and found to contain 1.01% hydrogen and 35.29% chlorine with the remiander being oxygen. What is the emeprical formula

Empirical formula is HClO₄.

Explanation:

Given data:

Percentage of hydrogen = 1.01%

Percentage of chlorine = 35.29%

Percentage of oxygen = 100- (35.29%+1.01%) = 63.7%

Empirical formula = ?

Solution:

Number of gram atoms of H = 1.01 / 1.01 = 1

Number of gram atoms of Cl = 35.29 / 35.5 = 1

Number of gram atoms of O = 63.7 / 16 = 4

Atomic ratio:

            H              :         Cl           :          O

           1/1              :        1/1            :       4/1

            1              :           1              :        4

H : Cl : O = 1 : 1 : 4

Empirical formula is HClO₄.

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.