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Leya [2.2K]
3 years ago
6

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:

9

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