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4 years ago

1. Which fuel was more efficient (produced more calories per gram)? Explain your answer.

Chemistry

1 answer:

OleMash [197]4 years ago

4 0

Answer:

The comparison is between Fuel canister (diethylene glycol) or Tea candle (paraffin)

The answer is tea candle( paraffin)

Explanation:

A fuel’s efficiency is based on its reaction with air(oxygen). It is said to be efficient when it burns well when exposed to air(oxygen).

Tea candle( paraffin) burns more efficiently in the presence of oxygen when compared to fuel canister( diethylene glycol) due to the hydrogen bonds in the molecules of fuel canister( diethylene glycol) making it more stable and having a lesser affinity to air (oxygen) than those of tea candle (paraffin).

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Calculate the moles of O atoms in 0.658 g of Mg(NO3)2.

lara31 [8.8K]

Answer:

There are 0.0267 moles of oxygen in 0.658 grams of magnesium nitrate.

Explanation:

Mass of magnesium nitrate = m = 0.658 g

Molar mass of magnesium nitrate = M = 148 g/mol

Moles of magnesium nitrate = n

$n=\frac{m}{M}=\frac{0.658 g}{148 g/mol}=0.004446 mol$

1 mole of magnesium nitrate has 6 moles of oxygen atoms. Then 0.004446 moles magnesium nitrate will have :

$6\times 0.004446 mol=0.026676 mol\approx 0.0267$

There are 0.0267 moles of oxygen in 0.658 grams of magnesium nitrate.

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Korolek [52]

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The molar mass of naoh is 40.00 G/mol. If 5.20 g naoh are dissolved in 0.500 l of solution what is the molarity of the solution

valkas [14]

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3 years ago

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