Question

How many grams of calcium nitrate are needed to react completely with 2.00 moles of hydrochloric acid?

Answer 1

Answer is 204 just put values in formula given mass/molar mass= no. Of moles

Answer 2

The mass of calcium nitrate that are needed to react completely are 164 grams

Explanation:

We are given:

Moles of HCl = 2.00 moles

The chemical equation for the reaction of calcium nitrate with HCl follows:

$Ca(NO_3)_2+2HCl\rightarrow CaCl_2+2HNO_3$

By Stoichiometry of the reaction:

2 moles of HCl reacts with 1 mole of calcium nitrate

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of calcium nitrate = 164 g/mol

Moles of calcium nitrate = 1 moles

Putting values in above equation, we get:

$1mol=\frac{\text{Mass of calcium nitrate}}{164g/mol}\\\\\text{Mass of calcium nitrate}=(1mol\times 164g/mol)=164g$

Learn more about stoichiometry:

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