Question

3. (05.04 MC)
What mass of Hy is needed to react with 8.75 g of O2 according to the following equation: 02(g) +h2g > h20g
H2(g)
0.547 g H2
1.10 g H2
4.38 g H2
17.5 g H2
4. (05.04 MC)
nroduce aluminum chloride according to the following equation.

Answer 1

Answer:

1.10 g H2

Explanation:

I took the test and got the answer correct

Answer 2

Answer: Mass of H₂ needed to react with O₂ : 1.092 g

Further explanation

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Reaction

O₂(g) + 2H₂(g) → 2H₂O(g)

mass of O₂ : 8.75 g

mol O₂(MW=32 g/mol) :

From the equation, mol ratio of O₂ : H₂ = 1 : 2, so mol H₂ :

Mass H₂ (MW=2 g/mol) :

.546 x 2 = 1.10 g