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Helen [10]
3 years ago
13

PLEASE HELP

Chemistry
2 answers:
11111nata11111 [884]3 years ago
5 0
It’s d. 224 g that’s the answer
bija089 [108]3 years ago
4 0

Answer:

D. 224 g

Explanation:

Let's consider the rusting of iron reaction.

4 Fe + 3 O₂ → 2 Fe₂O₃

The molar ratio of Fe to Fe₂O₃ is 4:2. The moles of Fe₂O₃ produced from 2.80 moles of Fe are:

2.80 mol Fe × (2 mol Fe₂O₃ / 4 mol Fe) = 1.40 mol Fe₂O₃.

The molar mass of Fe₂O₃ is 159.70 g/mol. The mass of Fe₂O₃ is:

1.40 mol × (159.70 g / 1 mol) = 224 g

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Answer:

A

Explanation:

In a galvanic cell, energy is produced by spontaneous chemical processes.

The cathode and anode of this cell will depend on the relative position of the two metals in the electrochemical series.

Aluminium is higher in the electrochemical series so aluminium will be the anode. Silver is lower in the electrochemical series so silver will be the cathode.

Recall that oxidation (electron loss) occurs at the anode while reduction (electron gain) occurs at the cathode.

8 0
3 years ago
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ikadub [295]

Answer: N_2(g)+3H_2(g)+4O_2(g)\rightarrow 2HNO_3(g)+2H_2O(g)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

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N_2(g)+3H_2(g)+4O_2(g)\rightarrow 2HNO_3(g)+2H_2O(g)

5 0
3 years ago
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shepuryov [24]
The best answer is letter A. 
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Answer:

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