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iren [92.7K]
4 years ago
15

Which equation obeys the law of conservation of mass? A. 2C4H10 + 2Cl2 + 12O2 7CO2 + CCl4 + 10H2O B. C4H10+ Cl2 + 2O2 7CO2 + CCl

4 + 8H2O C. 2C4H10+ 2Cl2 + 12O2 4CO2 + CCl4 + H2O D. 2C4H10+ 2Cl2 + 6O2 CO2 + CCl4 + 6H2O E. 4C4H10+ 4Cl2 + 14O2 14CO2 + CCl4 + 20H2O
Chemistry
1 answer:
Reptile [31]4 years ago
7 0

Answer : The correct option is A.

Explanation :

Law of conservation of mass : In the chemical reaction, the mass of reactant must be equal to the mass of product.

A. 2C_4H_{10}+2Cl_2+12O_2\rightarrow 7CO_2+CCl_4+10H_2O

The mass of reactant side = 2C_4H_{10}+2Cl_2+12O_2=[8(12)+20(1)]+4(35.5)+24(16)=642g

The mass of product side = 7CO_2+CCl_4+10H_2O=7(12)+14(16)+12+4(35.5)+20(1)+10(16)=642g

This means, the mass of product is equal to the mass of reactant. The mass remains conserved and obeys the law of conservation of mass.

The reaction B, C, D, E does not obey the law of conservation of mass.

Therefore, Only reaction A obey the law of conservation of mass.

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<h3>HOW TO CALCULATE VOLUME?</h3>

The volume of a substance can be calculated by dividing the mass by its density. That is;

Volume (mL) = mass (g) ÷ density (g/mL)

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