Question

A balanced chemical equation is in accordance with a)Avogadro’s law b)Law of multiple proportionc)Law of conservation of mass d)Law of gaseous volumes Question 7.The equation Cu + xHNO3 -> Cu(NO3)2 + yNO2 + 2H2O The values of x and y are a)3 and 5 b)8 and 6 c)4 and 2 d)7 and 1

Answer 1

Answer:

c) 4 and 2because value of x and y as 4 and 2 satisfies the eqation for balancing

Answer 2

Answer:

6. Correct option is (c) Law of conservation of mass

•Law of conservation of mass:

According to this law,the mass of reactants and mass of products are should be equal. Mass can't be destroyed nor generated in a reaction. This law was given by Antoine Lavoisier

7. Cu+xHNO3=>Cu(NO3)2+yNO2 + 2H2O

LHS:

Cu:1

H:1

N:1

O:3

RHS

Cu:1

N:2

H:4

O:10

The correct option is (c) 4 and 2.

Thus,(x,y)=(4,2)

These set of numbers balance the equation,they are correct values of the given variables

→Fact:

Lavoisier is regarded as the father of modern chemistry.