Question

Convert 22 g of carbon dioxide into moles.

Answer 1

Hint : The molarity is defined as the unit of expressing concentration of a substance. The number of moles of a substance can be calculated by formula - Number of moles = $\dfrac{{Given{\text{ mass}}}}{{Molar{\text{ mass}}}}$
The molar mass is the sum of atomic masses of all elements multiplied by the number of atoms.

Complete step by step answer :
We know that the number of moles of an element can be calculated from given mass by the formula - Number of moles = $\dfrac{{Given{\text{ mass}}}}{{Molar{\text{ mass}}}}$
We have been given mass of carbon dioxide = 22 g
Molar mass can be found as -
Molar mass of carbon dioxide = Atomic mass of Carbon + Atomic mass of Oxygen$\times$2
Molar mass of carbon dioxide = 12 + 16$\times$2
Molar mass of carbon dioxide = 12 + 32
Molar mass of carbon dioxide = 44
Thus, number of moles of carbon dioxide = $\dfrac{{22}}{{44}}$

Number of moles of carbon dioxide = 0.5 moles

Additional information :
In the United States, October 23 meaning 10/23 is celebrated as Mole Day. This date is derived from the$6.022 \times {10^{23}}$number of molecules' value that one mole of an element possesses. The mole day is assumed to start at 6.02 a.m. and finish at 6.02 p.m.

Note: One mole of an atom has $6.022 \times {10^{23}}$number of atoms or molecules. The mole describes the amount of substance. The mole concept forms the base of stoichiometry. It is a convenient method of expressing the amount of reactants and products.