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3 years ago

In order to amend the Articles of Confederation, how many votes were needed? A) 7 B) 9 C) 10 D) 13

Chemistry

2 answers:

blsea [12.9K]3 years ago

8 0

Answer:

Explanation:

Black_prince [1.1K]3 years ago

7 0

B is the answer
Hope it helped!

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Which of the following is one way that land contributes to production?

Phantasy [73]

Answer : Option B) Energy from the environment fuels production.

Explanation : Environmental fuels can be produced from lands and contribute towards production. The land can contribute for the production of a Biogas plant and help in generating energy from the plant. It uses mainly decaying matter and household wastes which are decomposed and then produce methane gas is then connected to the household kitchens.

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3 years ago

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What are 5 responsibilities a citizen has in taking part in public affairs

zimovet [89]

1. To vote
2. To abide by laws
3. To contribute to society positively
4. To be kind to people around you
<span>5. To pass on the top four to your children and neighbors</span>

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3 years ago

The pH of a 0.25 M (aq) solution of hydrofluoric acid, HF, at 25C is 2.03. What is the value of Ka for HF? Pls show all mathemat

Snezhnost [94]

Answer:

Explanation:

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3 years ago

The process of change in a population over time is called what?

guapka [62]

Answer:

Microevolution

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3 years ago

How much heat is released when 75 g of octane is burned completely if the enthalpy of combustion is -5,500 kJ/mol CsH18? C8H18 +

aalyn [17]

Answer : The correct option is, (D) 3600 kJ

Explanation :

Mass of octane = 75 g

Molar mass of octane = 114.23 g/mole

Enthalpy of combustion = -5500 kJ/mol

First we have to calculate the moles of octane.

$\text{ Moles of octane}=\frac{\text{ Mass of octane}}{\text{ Molar mass of octane}}=\frac{75g}{114.23g/mole}=0.656moles$

Now we have to calculate the heat released in the reaction.

As, 1 mole of octane released heat = -5500 kJ

So, 0.656 mole of octane released heat = 0.656 × (-5500 kJ)

= -3608 kJ

≈ -3600 kJ

Therefore, the heat released in the reaction is 3600 kJ

5 0

3 years ago