Answer:
Explanation:
Mole = no. Molecules/6.02×10^23
Mole = (8.12×10^23)/(6.02×10^23)
Mole = 1.35mole
Molar mass of CO2 = 12+ 2(16)
Molar mass= 12 + 32= 44g/mol
Mole = mass/molar mass
Mass = Mole × molar mass
Mass = 1.35× 44
Mass= 59.35g
The mass of [tex]\rm 8.12\;\times\;10^2^3[/tex] molecules of carbon-di-oxide is 59.319 grams.
Avogadro number has been able to give the number of molecules in a mole of a compound.
[tex]\rm Avogadro\;number\;=\;\dfrac{number\;of\;molecules}{moles\;of\;sample}[/tex]
From the Avogadro number, the moles of Carbon-di-oxide in [tex]\rm 8.12\;\times\;10^2^3[/tex] molecules will be:
Moles of Carbon di-oxide = [tex]\rm \dfrac{number\;of\;molecules}{Avogadro\;number}[/tex]
Avogadro number = 6.023 [tex]\rm \times\;10^2^3[/tex]
number of molecules of carbon-di-oxide = [tex]\rm 8.12\;\times\;10^2^3[/tex]
Moles of carbon dioxide = [tex]\rm \dfrac{8.12\;\times\;10^2^3}{6.023\;\times\;10^2^3}[/tex]
Moles of carbon-di-oxide = 1.34 moles.
The molar mass of the substance can be defined as the mass of 1 mole of a substance.
The molar mass of Carbon-di-oxide = 44 g/mole
Mass of 1 mole of Carbon-di-oxide = 44 g
Mass of 1.34 moles of Carbon-di-oxide = 59.319 grams.
The mass of [tex]\rm 8.12\;\times\;10^2^3[/tex] molecules of carbon-di-oxide is 59.319 grams.
For more information about the mass of molecules, refer to the link:
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