Fill in the blanks with the correct coefficient to balance the chemical equation

Question

Fill in the blanks with the correct coefficient to balance the chemical equations below. Fractional coefficients will not be accepted. Coefficient must be reduced to the lowest whole number if possible and leave blank empty if the coefficient should be one.

CuO (s) -H2 (g) Cu (s) + H20 ) + B4C3 (s) CO2 (g) B203 (s) + C (s) + -> 02(3) CO2(g) H20 ) NH3 (g)t 20 (g) CuSO4 (s)-- KI (s) Cul (s) + 12 (s) + K2SO4 (s) For the reaction: C2H4(g) + O2(g) how many moles of O2 were reacted? CO2(g) + H2O(g) If 6.0 mol of CO2 are produced, e. 18.0 mol f. None of the answers a. 9.0 mol b. 7.5 mol c. 4.0 mol d. 15.0 mol (a through e) is correct

Explanation / Answer

1)
CuO(s) + H2 (g) --->Cu(s) + H2O (l)
2)
B4C3(s) + 3 CO2 (g) ---> 2 B2O3 (s) + 6 C (s)
3)
C2H5OH (l) + 3O2 (g) ---> 2CO2 (g) + 3H2O (l)
4)
4NH3(g) + 5O2 (g) --->4NO (g) + 6H2O (g)

I am allowed to answer only 4 parts at a time

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