Question

How many grams of hydrogen gas are produced if 6 moles of hydrochloric acid reacts with 2 mole of Al?

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6HCl(aq) + 2Al(s) → 2AlCl3(s) + 3H2(g)
six moles of hydrochloric acid reacts with two moles of aluminum to produce 2 moles of aluminum chloride plus 3 moles of hydrogen gas.


A.
4.65 grams
B.
3 grams
C.
66.06 grams
D.
6.06 grams

Answer 1

Answer:

I think A

Explanation:

Answer 2

Grams are the unit of weight or the mass that is the multiplication of the moles and the molar mass of the substance. The mass of hydrogen gas produced is 6.06 gm.

What is mass?

Mass is calculated in grams by multiplying the number of moles of the substance and the molar mass of the given molecule or compound.

Given,

Moles (n) of hydrogen = 3 mol

Molar mass of dihydrogen = 2.007 g/mol

Mass is calculated as:

$\begin{aligned} \rm Mass &= \rm moles \times molar\; mass\\\\&= 3 \times 2.007\\\\&= 6.06\; \rm gm\end{aligned}$

Therefore, option D. 6.06 gm is the mass of hydrogen gas.

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