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lisabon 2012 [21]
2 years ago
8

Last lesson we calculated that propane has an energy of combustion of 2220 kilojoules per mole while hydrogen gas (rocket fuel)

has an energy of combustion of 286 kilojoules per mole. However, hydrogen gas has a much higher energy of combustion per gram than propane. Why is this? ​

Chemistry
1 answer:
3241004551 [841]2 years ago
5 0

Answer:

1 or a

Explanation:

The number of grams in each mole of hydrogen gas is smaller than the number of grams in each mole of propane gas.

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A soccer player applies a force of 56.6 N to a soccer ball while kicking it. If the ball has a mass of 0.46 kg, what is the acce
lubasha [3.4K]

Answer:

a=123.04\ m/s^2

Explanation:

Given that,

Force applied to a soccer player, F = 56.6 N

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3 0
3 years ago
How many moles are in 43.5 g of sodium hydroxide (NaOH)?
Makovka662 [10]

Answer:

1.09 moles of NaOH

Explanation:

First of all, to calculate moles, you need to find the molar mass of NaOH.

Let us first find the molar mass of NaOH then.

Na = 23.0 amu

O = 16.0

H = 1.0

They are 1 nitrogen atom, 1 oxygen atom, and one hydrogen atom.

So do this.

23.0(1) + 16.0(1) + 1.0(1) = 40 g/mol.

Now use dimensional analysis to show your work

43.5 g of NaOH * 1 mol of NaOH / 40 g/mol of NaOH

The grams cancel out.

43.5 / 40.0 = 1.0875

Use sig figs and round the answer to the nearest hundredths place.

1.0875 = 1.09

So the final answer is 1.09 moles of NaOH

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What is an example of conduction?
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Answer:

The correct answer is A.

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