Answer:
The answer to your question is:
a) 2.5 mol of Fe
b) 5.63 mol of H2
c) 672 g of Fe2O3
Explanation:
a) Fe₂O₃(s) + 3H₂(g) → 2Fe + 3H₂O(l)
1 mol of Fe₂O₃ ------------- 2 mol of Fe
1.25 mol ------------- x
x = (1.25 x 2) / 1
x = 2.5 mol of Fe
b) Fe₂O₃(s) + 3H₂(g) → 2Fe + 3H₂O(l)
3 moles of H2 ---------------- 2 moles of Fe
x ---------------- 3.75 mol Fe
x = (3.75 x 3) / 2
x = 5.63 mol of H2
c) Fe₂O₃(s) + 3H₂(g) → 2Fe + 3H₂O(l)
1 mol of Fe2O3 ------------------ 3 moles of H2O
x ---------------- 12.5 moles of H2O
x = (12.5 x 1) / 3
x = 4.2 moles of Fe2O3
MW Fe2O3 = (2 x 56) + (16 x 3)
= 112 + 48
= 160 g
160 g Fe2O3 ----------------- 1 mol of Fe2O3
x ----------------- 4.2 moles of Fe2O3
x = (4.2 x 160) / 1
x = 672 g of Fe2O3
Answer:
12 nitrogen atoms
Explanation:
This is essentially 3 molecules of Lead (IV) Nitrate, And since there were originally 4 nitrogen atoms in this single ionic compound, there are now 12 total
When a solute, sugar in this case, is added, the boiling point of the solution increases. Additionally, the melting point decreases.
To answer your question,
The boiling point of pure water is lower than sugar-water solution.
The melting point is higher for pure water than for sugar-water solution.
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The statement which is an inference is; "the velocity of the stream is greatest near the outside of a meander."
The scientific method involves observations, hypothesis, experimentation and inference. The inference is a conclusion arrived at after conducting an experiment.
Hence, an inference is not a futuristic statement or a prediction but a statement of fact as gathered through the scientific study. The statement which represents an inference among the options is; "the velocity of the stream is greatest near the outside of a meander."
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Yes. They are called compound machines because two or more simple machines were combined to create it.