chasechevy13
29.01.2021 •
Chemistry
Iron metal reacts with elemental oxygen to form rust according to the unbalanced reaction, Fe(s) + O2(g) → Fe2O3(s),. What is the coefficient of the iron, Fe(s), in the balanced reaction?
a
1
b
2
c
3
d
4
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Ответ:
c. 3
Explanation:
The unbalanced reaction expression is given as:
Fe + O₂ → Fe₂O₃
To balance the expression gives the coefficient of oxygen.
Assign the coefficients a,b, c and use a mathematical approach to solve this problem:
aFe + bO₂ → cFe₂O₃
Conserving Fe: a = 2c
O: 2b = 3c
Now let c = 1, a = 2, b =
Multiply through by 2,
a = 4, b = 3 and c = 2
4Fe + 3O₂ → 2Fe₂O₃
The coefficient of O₂ is 3
Ответ:
D. 2666.67g/dm3
Explanation:
Hello,
In this case, we compute the solubility as:
Thus, we compute:
Therefore, answer is D. 2666.67g/dm3.
Best regards.