Question

E. How many particles are present a
mole of a substance ?
F. What is the SI unit of amount o
substance ?
G. What is meant by molar volume
gas ?
H. State and explain the law of conserve
of mass.
I. State the law of multiple proportio​

Answer 1

Answer:

E.

$1mole = 6.0221367 \times {10}^{23} atoms per mole$

F. mole is the SO unit of amount of substance.

G. One mole of any gas occupies a volume of 22.4 dm3 at standard temperature (0 degree Celsius) and pressure (1 atm) (STP). the volume of 22.4 dm3 at STP is known as molar volume of a gas.

H. mass can neither be created nor destroyed.

I. when two elements A and B form more than one compounds, the masses of element B that combine with a given mass of A are always in the ratio of small whole numbers.