Boron trifluoride/Molar mass
67.81 g/mol
Answer:
41.6 moles
Explanation:
We apply the Ideal Gases Law to solve this:
P . V = n . R . T
Volume is 1m³ but we need to convert to dm³ (L), because the units of R
1m³ . 1000 dm³/1m³ = 1000 dm³ → 1000L
Now we replace → 1 atm . 1000 L = n . 0.082L.atm/mol.K . 293.15K
(1 atm . 1000 L) / (0.082L.atm/mol.K . 293.15K) = n → 41.6 moles
Answer:
3:2, B
Explanation:
The mole ratio is simply the coefficients in a balanced chemical reaction and their relation to each other.
One simple way to easily know b is the correct answer is to look at the units for the answer choices. A is a ratio of Fe to Fe, C is a ratio of Mg to Fe, and d is a ratio of Mg to Fe. That alone must mean B is the correct answer.
We can also use the definition of a mole ratio, as stated above. Given that this equation is balanced, the mole ratio is simply the ratio of the coefficients, and is thus 3:2.
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