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3 years ago

30. A solid sample contains only CaCO3, and MgCO3.

Chemistry

1 answer:

lutik1710 [3]3 years ago

8 0

Answer:

Explanation:

Step 1

The mass percent of MgCO3 in the original mixture is calculated as shown,

Step 2

Masses of MgCO3 and CaCO3 is 24g; Moles of carbon dioxide produced from Magnesium carbonate and Calcium carbonate are.

Step 3

Adding and equating the moles of Carbon dioxide results in,

Step 4

Percent mass of MgCO3 in the sample is calculated as,

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Complete Question

Questions Diagram is attached below

Answer:

* $W=1142.86Joule$

* $Q=997.7J$

* $H=2140.5J$

Explanation:

From the question we are told that:

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Work-done

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Explanation:

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How many moles of nitrogen are in 2.31L of N2

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Hey there!

N₂ has a density of 1.25 grams per liter.

We have 2.31 liters of N₂.

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We have 2.8875 grams of N₂.

Find molar mass of N₂:

N: 2 x 14

------------

28 g/mol

2.8875 ÷ 28 = 0.10

There is 0.10 mol of nitrogen in 2.31 L of N₂.

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