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Calculate the mass of chromium produced from 50g of Cr2O3.

User FiftiN
by
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1 Answer

11 votes
11 votes

Answer: 34 gram of chromium produced from 50g of
Cr_2O_3

Step-by-step explanation:

To calculate the moles :


\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}


\text{Moles of} Cr_2O_3=(50g)/(152g/mol)=0.33moles

The decomposition of
Cr_2O_3 follows the equation :


2Cr_2O_3\rightarrow 4Cr+3O_2

According to stoichiometry :

2 moles of
Cr_2O_3 produce = 4 moles of
Cr

Thus 0.33 moles of
Cr_2O_3 will produce=
(4)/(2)* 0.33=0.66moles of
Cr

Mass of
Cr=moles* {\text {Molar mass}}=0.66moles* 52g/mol=34g

Thus 34 gram of chromium produced from 50g of
Cr_2O_3

User Hesham Fas
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