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Kamila [148]
3 years ago
7

Balancing Chemical Equations.

Chemistry
1 answer:
skad [1K]3 years ago
7 0

1. 2CaS + 2H2O --> Ca(HS)^2 + Ca(OH)^2

2. Au^2S^3 + 3H2 --> 2Au + 3H2S

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What is minimum volume of oxygen required to react with 42.5 g of aluminum in the synthesis of aluminum oxide at stp?
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<span>26.833 liters

Aluminum oxide has a formula of Al</span>₂O₃,<span> which means for every mole of aluminum used, 1.5 moles of oxygen is required (3/2 = 1.5).

Given 42.5 g of aluminum divided by its atomic mass (26.9815385) gives 1.575 moles of aluminum.

Since it takes 1.5 moles of oxygen per mole of aluminum to make aluminum oxide, you'll need 2.363 moles of oxygen atoms.

Each molecule of oxygen gas has 2 oxygen atoms, so the moles of oxygen gas will be 2.363/2 = 1.1815

Finally, you need to calculate the volume of </span>1.1815 <span>moles of oxygen gas.
1 mole of gas at STP occupies 22.7 liters of volume. Therefore,

1.1815 * 22.7 = </span>26.8 liters <span>of oxygen gas.
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3 years ago
The process by which DNA is copied during the cell cycle
Eduardwww [97]
Cell replication in somatic cells is called mitosis.
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5 0
3 years ago
Read 2 more answers
Select the correct answer.
Elina [12.6K]

Answer:

CU

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2 years ago
In redox reactions, _____________ occurs when electrons are lost by a molecule. ______________ occurs when electrons are gained
madam [21]

Answer:

Oxidation, Reduction

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A redox reaction is a short form for reduction-oxidation.

Reduction is a term which means that electron is gained while oxidation is a term which means that electron Is lost.

The species that gain electron is known as the oxidizing agent while the species losing electrons is known as the reducing agent

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