<u>Answer:</u>
(A)
Density = Mass / Volume
So
Mass = Density × Volume


Mole ratio of toluene : Oxygen is 1 : 9

(B)
1 mole of Toluene produces 7 moles of
gas and 4 moles of
Vapour
So the mole ratio is 1 : 11

(C)
1mole contains
molecules

Answer:
yes is it yes yes yes yes yes yes yes yes yes yes
Answer&Explanation:
The unit used to measure Heat is joule equal to that of Energy and is abbreviated as (J)
Noble gases
also known as Inert gases