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Harding
Chemistry
9 February, 10:43
Convert 12.0 g of CO2 (44.0 g/mol) to molecules.
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Jadon
9 February, 10:44
0
Answer: 1.64 x 10^23 molecules
Explanation:
Amount of moles of CO2 (n) = ?
Mass of NaOH in grams = 12.0g
Molar mass of CO2, use the molar masses of:
Carbon, C = 12g
Oxygen, O = 16g;
CO2 = 12g + (16g x 2)
= 12g + 32g
= 44g/mol
Since, amount of moles = mass in grams / molar mass
n = 12.0g / 44.0g/mol
n = 0.2727 mole
Now based on Avogadro's law:
1 mole of any substance has 6.02 x 10^23 molecules
So, 1 mole of CO2 = 6.02 x 10^23 molecules
0.2727 moles of CO2 = Z
To get the value of Z, cross multiply:
(Z x 1mole) = (6.02 x 10^23 molecules x 0.2727 moles)
Z = 1.64 x 10^23 molecules
Thus, 12.0 g of CO2 has 1.64 x 10^23 molecules
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