Hey there!:
Molar mass CO2 = 44.01 g/mol
44.01 g CO2 ------------------- 6.02*10²² molecules CO2
88 g CO2 ------------------------ y
y = 88 * ( 6.02*10²² ) / 44.01
y = 5.29*10²⁵ / 44.01
y = 1.2 * 10²⁴ molecules of CO2
Answer A
Hope that helps!
The question is confusing and all the answers are not there but it is B C and D
D. through measuring and observing !
Answer:
13.92 %
Explanation:
Mass of
= 12.5221 g
Molar mass of
= 233.43 g/mol
The formula for the calculation of moles is shown below:
Thus,
Moles of
= 0.0536 moles
According to the given reaction,

1 mole of
is formed from 1 mole of 
Thus,
0.0536 moles of
is formed from 0.0536 moles of 
Moles of
= 0.0536 moles
Moles of sulfur in 1 mole
= 1 mole
Moles of sulfur in 0.0536 mole
= 0.0536 mole
Molar mass of sulfur = 32.065 g/mol
Mass = Moles * Molar mass = 0.0536 * 32.065 g = 1.7187 g
Mass of ore = 12.3430 g
Mass % =
=
= 13.92 %