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Sergeeva-Olga [200]
3 years ago
5

Determine the volume of liquid in each graduated cylinders.

Chemistry
1 answer:
Anna007 [38]3 years ago
5 0
Every day is that good day lol I don’t have a lot to go with them but I’m going on the go and I go to the school day so I’ll go buy a new pair lol I don’t have time for them lol I don’t have time for that lol I didn’t buy them for them.
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H2 + Br2 → 2HBr If 2.23 g of hydrogen (H2) reacts completely, how many grams of hydrogen bromide (HBr) is formed? (mw Br=79.9) Q
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Answer:

The correct option is;

B) 179 g

Explanation:

The parameters given are;

Mass of H₂ that takes part in the reaction = 2.23 g

Molar mass of hydrogen gas, H₂ = 2.016 g

Number of moles, n, of hydrogen gas H₂ is given by the relation;

n = \dfrac{Mass \ of \ hydrogen \ gas, \, H_2 }{Molar \ mass \ of  \, H_2 } = \dfrac{2.23}{2.016} = 1.106 \ moles

Chemical equation for the reaction;

H₂ + Br₂ → 2HBr

Given that one mole of H₂ reacts with one mole of Br₂ to produce two moles of HBr

1.106 mole of H₂ will react with 1.106 mole of Br₂ to produce 2 × 1.106 which is 2.212 moles of HBr

The molar mass, of HBr = 80.91 g/mol

The mass of HBr produced = Molar mass of HBr × Number of moles of HBr

The mass of HBr produced = 80.91 × 2.212 = 178.997 g ≈ 179 grams

Therefore, the correct option is B) 179 g.

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<em>An intramolecular force is between that atoms makeup a molecule. An intermolecular force is between entire molecules. A non-polar covalent bond occurs when the electrons are equally shared between atoms.</em>

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