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Sonbull [250]
2 years ago
10

1.How many moles of each element are in 0.0250 mol of K 2 Cr O 4?

Chemistry
1 answer:
garik1379 [7]2 years ago
8 0

Answer:

1. In 0.0250 moles of potassium chromate there are 0.05 moles of potassium , 0.025 moles of chromium and 0.1 moles of oxygen are present.

2. In 4.50 moles of ammonium carbonate there are 9 moles of ammonium ions and 4.5 moles of carbonate ions are present.

Explanation:

1.

Moles of potassium chromate = 0.0250 mol

Formula of potassium chromate = K_2CrO_4

1 mole of potassium chromate has 2 moles of potassium , 1 mole of chromium and 4 moles of oxygen.

Then in 0.0250 moles of potassium chromate:

Moles of potassium will be:

2\times 0.0250 mol= 0.05 mol

Moles of chromium will be:

1\times 0.0250 mol= 0.025 mol

Moles of oxygen will be:

4\times 0.0250 mol= 0.1 mol

2.

Moles of ammonium carbonate = 4.50 mol

Formula of ammonium carbonate =(NH_4)_2CO_3

1 mole of ammonium carbonate has 2 moles of ammonium ion and 1  mole of carbonate ion.

Then in 4.50 moles of ammonium carbonate:

Moles of ammonium ion will be:

2\times 4.50 mol= 9mol

Moles of carbonate ions will be:

1\times 4.50 mol= 4.5 mol

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Explanation:

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If 1. 3618 moles of AsF3 are allowed to react with 1. 0000 mole of C2Cl6, what would be the theoretical yield of AsCl3, in moles
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Answer:

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4:3

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or

Balanced equation

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Use stoichiometry to calculate the moles of AsCl3 that can be produced by each reactant.

Multiply the moles of each reactant by the mole ratio between it and AsCl3 in the balanced equation, so that the moles of the reactant cancel, leaving moles of AsCl3.

Explanation:

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What volume of lead (of density 11.3 g/cm3) has the same mass as 330 cm3 of a piece of redwood (of density 0.38 g/cm3)?
zimovet [89]

Answer:

The sample of lead has a volume of 11.1 cm³

Explanation:

<u>Step 1:</u> Data given

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The sample of lead has a volume of 11.1 cm³

3 0
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