Question

question 15 of 30
values for the molar mass of hydrogen, chlorine, and hydrogen chloride molecules are given in the table below. what mass of hydrogen chloride is formed when 1 mole of hydrogen reacts with 1 mole of chlorine?

molecule	molar mass (g/mol)
cl₂	70.90
hcl	36.48

a. 72.92 g
b. 36.46 g
c. 145.84 g
d. 1.00 g

Explanation:

Step1: Write the chemical reaction

The reaction is $H_2 + Cl_2 = 2HCl$.

Step2: Determine the mole - ratio

From the balanced equation, 1 mole of $H_2$ reacts with 1 mole of $Cl_2$ to produce 2 moles of $HCl$.

Step3: Calculate the mass of $HCl$

Given the molar mass of $HCl$ is 36.48 g/mol. For 2 moles of $HCl$, the mass $m = n\times M$, where $n = 2$ mol and $M=36.48$ g/mol. So $m = 2\times36.48$ g = 72.96 g (there may be a slight difference due to rounding in molar - mass values in the table). The closest value is 72.92 g.

Answer:

A. 72.92 g