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77julia77 [94]
3 years ago
5

A book has a mass of 2.2 kilograms. what is the weight on earth?

Chemistry
1 answer:
lana66690 [7]3 years ago
6 0
<span>the answer is 21.56 N

hoped it helped !
</span>
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Use the equation to determine what mass of FeS must react to form 326 g of FeCl2.
iogann1982 [59]

Answer:

We need 226 grams of FeS

Explanation:

Step 1: Data given

Mass of FeCl2 = 326 grams

Molar mass FeCl2 = 126.75 g/mol

Step 2: The balanced equation

FeS + 2 HCl → H2S + FeCl2

Step 3: Calculate moles FeCl2

Moles FeCl2 = 326 grams / 126.75 grams

Moles FeCl2 = 2.57 moles

Step 4: Calculate moles FeS needed

For 1 mol H2S and 1 mol FeCl2 produced, we need 1 mol FeS and 2 moles HCl

For 2.57 moles FeCl2 we need 2.57 moles FeS

Step 5: Calculate mass FeS

Mass FeS = 2.57 moles * 87.92 g/mol

Mass FeS = 226 grams FeS

We need 226 grams of FeS

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What is the mass of one mole of carbon-12?
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Answer:

Hello

12 grams

The mass of one mole of carbon-12 atoms is 12 grams.

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