How much heat is given off when 8 g of hydrogen reacts in: 2H₂ + O₂ → 2H₂O; ΔH = -115.60 kcala. -57.8 kcal
b. -115.6 kcal
c. -173.4 kcal
d. -231.2 kcal
e. -462.4 kcal

Answers

Answer 1

Answer: ΔΗ= -115.6 kJ/mol
H2 has a Mr of 2, so as mol=mass/mr we can work out that there are 4 moles of H reacting

Therefore we multiply -115.6 by 4 = -462.4

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Answers

Answer:

false

Explanation:

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Hope this helps

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Answers

Liquid into solid, gas into a liquid, gas into a solid (deposition).
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If a reaction system has come to equilibrium, the concentration of products can be increaseda.
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Answers

If a reaction system has come to equilibrium, the concentration of products can be increased by applying Le Châtelier’s principle. The answer is letter C. The statements "only if it is not reversible", "only if the temperature is low enough" and "under no circumstances" do not answer the question above.

An Arrhenius base yields which ion as the only negative ion in an aqueous solution?(1) hydride ion (3) hydronium ion
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Answers

An Arrhenius base yields hydroxide ion as the only negative ion in an aqueous solution.

What is an Arrhenius base?

This is defined as a substance which dissociates in water to form hydroxide (OH–) ions.

The hydroxide ion formed from the aqueoussolution is the only negative ion which is why option 4 was chosen.

Read more about Arrhenius base here brainly.com/question/1303158

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Arrhenius bases are substances which produces hydroxide ions in solution. The only negative ion in an aqueous solution is the hydroxide ion. The answer is number 4.

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Answers

Answer: Attracting the heat of the nebular cloud

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