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Katen [24]
3 years ago
12

At stp,250cm3 of gas had a mass of 0.36g.what result does this give for the molar mass of the gas​

Chemistry
1 answer:
Dafna11 [192]3 years ago
5 0

Answer:

32,256g/mol

Explanation:

n= V/Vm

n = 0.25/22.4

n = 0.01

0.01 = 0.36/M

M = 0.36/0.01

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Explanation:

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How much heat must absorbed by the reaction system to convert 100g of NaNO3 into NaHSO4(s)?
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A sample weighing 3.110 g is a mixture of Fe 2 O 3 (molar mass = 159.69 g/mol) and Al 2 O 3 (molar mass = 101.96 g/mol). When he
grandymaker [24]

Answer:

The mass fraction of ferric oxide in the original sample :\frac{723}{3110}

Explanation:

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Mass of Fe_2O_3=x

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After heating the mixture it allowed to react with hydrogen gas in which all the ferric oxide reacted to form metallic iron and water vapors where as aluminum oxide did not react.

Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(g)

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The mass fraction of ferric oxide in the original sample :

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Which of the following is evidence of a chemical change?
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