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DaniilM [7]
3 years ago
7

The empirical formula for a compound is CH2O, and the molar mass is 180.2 g/mol. Which is the molecular formula for this compoun

d?A) C6H12O6
B) C7H16O5
C) C8H20O4
D) C3H6O3
Chemistry
1 answer:
Elodia [21]3 years ago
7 0

Answer : The correct option is, (A) C_{6}H_{12}O_6

Explanation :

Empirical formula : It is the simplest form of the chemical formula which depicts the whole number of atoms of each element present in the compound.  

Molecular formula : it is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

n=\frac{\text{molecular mass}}{\text{empirical mass}}

As we are given that the empirical formula of a compound is CH_2O and the molar mass of compound is, 180.2 gram/mol.

The empirical mass of CH_2O = 1(12) + 2(1) + 1(16) = 30 g/eq

n=\frac{\text{molecular mass}}{\text{empirical mass}}

n=\frac{180.2}{30}=6

Molecular formula = (CH_2O)_n=(CH_2O)_6=C_{6}H_{12}O_6

Thus, the molecular formula of the compound will be, C_{6}H_{12}O_6

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2 NaCL + CaO = CaCL2 + Na2O
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222 grams of calcium chloride is produced.

<h3><u>Explanation</u>:</h3>

The mole concept and the chemical equation are very much closely related with each other. In the chemical reaction, the compounds or elements in both sides are balanced according to the number of atoms of each side of the reaction. So from there we can easily find the amount of reactant reacts to produce desired product.

Here we can see that 2 moles of sodium chloride produces 1 mole of calcium chloride.

So, 4 moles of sodium chloride will produce 2 moles of calcium chloride.

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