. The equation for the synthesis of ammonia is N 2 + 3H 2 à 2NH 3 . How many moles of H 2 are needed to produce 6 mol NH 3 ? a. 4 b. 6 c. 8 d. 9 2. What mass of copper is produced when 3.8 g of iron reacts with excess copper(II) sulphate according to the equation Fe + CuSO 4 à FeSO 4 + Cu? a. 6.4 g b. 4.3 g c. 3.3 g d. 3.8 g
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1. The equation for the synthesis of ammonia is N 2 + 3H 2 à 2NH 3 . How many moles of H 2 are needed to produce 6 mol NH 3 ?
a. 4
b. 6
c. 8
d. 9
2. What mass of copper is produced when 3.8 g of iron reacts with excess copper(II) sulphate according to the equation Fe + CuSO 4 à FeSO 4 + Cu?
a. 6.4 g
b. 4.3 g
c. 3.3 g
d. 3.8 g
3. If 16.4 g Na 2 CrO 4 are combined with 26.2 g AgNO 3 in a double-replacement reaction, what will be the limiting reactant?
a. Na 2 CrO 4
b. AgNO 3
c. NaNO 3
d. Ag 2 CrO 4
4. Magnesium reacts with hydrochloric acid according to the following equation: Mg + 2HCl à MgCl 2 + H 2 . If 0.30 mol Mg reacts, how many molecules of HCl will also react?
a. 2.0 x 10 24
b. 1.8 x 10 23
c. 3.0 x 10 23
d. 3.6 x 10 23
5. If 3.0 L CH 4 are burned according to the equation CH 4 + 2O 2 à CO 2 + 2H 2 O
a. 3.0 L.
b. 44 L.
c. 132 L.
d. 6.0 L.
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