Answer:
0.3171 moles
Explanation:
The computation of the number of moles of gas in the drum is shown below;
The ideal gas equation is
PV = nRT
where
P denotes the pressure of the gas
V denotes the volume of the container
n denotes the number of moles of gas
R denotes the Gas constant
T denotes the temperature
Also P proportionate to n
Now the following formula should be used
P_1 ÷ P_2 = n_1 ÷ n_2
742 ÷ 759 = 0.31 ÷ n_2
n_2 = 759 × 0.31 ÷742
= 0.3171 moles
The average atomic mass of the element = 35.5
calculation
average atomic mass = sum of the masses of its isotope each multiplied by its natural abundance.
that is
[(75 x35) +(25 x37)] /100 = 35.5
Answer:
From the balanced chemical equation 4 iron atoms react with 3 oxygen molecules to yield 2 iron (III) oxide formula units. Or 4 moles of iron atoms react with 3 moles of oxygen molecules to yield 2 moles of iron (III) oxide.
Answer:
The relative number of products and reactants
Explanation:
- The numerical coefficients in chemical equations show the ratio of the molecules of each substance involved in a chemical reaction that is both reactants and products.
- The coefficients in a balanced chemical equation indicate the relative number of moles of reactants and products.
- Additionally, coefficients are important to prove the law of conservation of mass.