Answer:
1.53 L
Explanation:
Step 1: Given data
Step 2: Calculate the moles (n) corresponding to 11.2 g of oxygen
The molar mass of oxygen is 32.00 g/mol.
11.2 g × (1 mol/32.00 g) = 0.350 mol
Step 3: Calculate the volume of oxygen
We will use the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 0.350 mol × (0.0821 atm.L/mol.K) × 415 K / 7.78 atm
V = 1.53 L
Answer: 1.8 moles Fe and 2.7 moles are produced.
The balanced chemical reaction is:
According to stoichiometry :
3 moles of require 1 mole of
Thus 2.7 moles of will require= of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent.
As 3 moles of give = 2 moles of and 3 moles of
Thus 2.7 moles of will give = of and of
Thus 1.8 moles Fe and 2.7 moles are produced.
the answer is B.Construction
Polywool fibre is <u>synthetic</u>.
⇒b. Synthetic
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