All categories

3 years ago

Consider the reaction.

Chemistry

2 answers:

Liula [17]3 years ago

7 0

Answer is: (3 24.31) g of Mg produce (3 22.4) L of H2 gas.

Balanced chemical reaction:

3Mg(s) + 2H₃PO₄(aq) → Mg₃(PO₄)₂(s) + 3H₂(g).

From chemical reaction: n(Mg) : n(H₂) = 3 : 3 (1 : 1).

n(Mg) = n(H₂).

m(Mg) = 24.31 g; mass of magnesium.

n(Mg) = m(Mg) ÷ M(Mg).

n(Mg) = 24.31 g ÷ 24.31 g/mol.

n(Mg) = 1 mol; amount of the magnesium.

V(H₂) = n(H₂) · Vm.

V(H₂) = 1 mol · 22.4 L/mol.

V(H₂) = 22.4 L; volume of the hydrogen gas.

So, 3·24.31 g of magnesium (3 mol) produce 3·22.4 liters of hydrogen.

galben [10]3 years ago

5 0

<span>the answer is d D d D DDDDD

</span>

You might be interested in

Boron has an average mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The

Andrej [43]

The average mass of an atom is calculated with the formula:

average mass = abundance of isotope (1) × mass of isotope (1) + abundance of isotope (2) × mass of isotope (2) + ... an so on

For the boron we have two isotopes, so the formula will become:

average mass of boron = abundance of isotope (1) × mass of isotope (1) + abundance of isotope (2) × mass of isotope (2)

We plug in the values:

10.81 = 0.1980 × 10.012938 + 0.8020 × mass of isotope (2)

10.81 = 1.98 + 0.8020 × mass of isotope (2)

10.81 - 1.98 = 0.8020 × mass of isotope (2)

8.83 = 0.8020 × mass of isotope (2)

mass of isotope (2) = 8.83 / 0.8020

mass of isotope (2) = 11.009975

mass of isotope (1) = 10.012938 (given by the question)

5 0

3 years ago

Assume that the pressure inside of the 1 liter balloon is 200,000 Pa, what is the explosive energy in the inside the balloon? Ex

AysviL [449]

Answer:

200 Joules is the explosive energy in the inside the balloon. And that is $9.523\times 10^{-5}$ 1 lb of TNT.

Explanation:

$Pressure=\frac{force}{Area}=\frac{Force\times distance}{Area \times distance}=\frac{Energy}{Volume}$

Volume of the balloon = V = 1 L = $0.001 m^3$

Pressure inside the balloon ,P= 200,000 Pa = $200,000 N/m^2$

Explosive energy in the inside the balloon be E.

E = Pressure × Volume

$E=200,000 N/m^2\times 0.001 m^3=200 Joules$

1 lb of TNT = $2.1\times 10^6 J$

200 Joules = $200\times \frac{1}{2.1\times 10^6 }$ 1 lb of TNT

= $9.523\times 10^{-5}$ 1 lb of TNT

5 0

2 years ago

O que é etnocentrismo

Shtirlitz [24]

Answer:

yes and bla bla

........

4 0

2 years ago

Which formula correctly represents the composition of iron III oxide

nikitadnepr [17]

The answer to the question is- Fe2O3

6 0

2 years ago

PLEASE HELP I WILL GIVE BRAINLIEST

stellarik [79]

Answer: YES!

Explanation:

Ox2 Co2 Hydrogen and Corossion 3

3 0

2 years ago