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anzhelika [568]
2 years ago
10

A 1.50 g sample of a pure compound, containing only carbon and hydrogen, was

Chemistry
1 answer:
AfilCa [17]2 years ago
8 0

The mass of the hydrogen is obtained as 0.302 g.

<h3>What is the mass of hydrogen?</h3>

A hydrocarbon is a compound that contains only carbon an hydrogen. The amount of the carbon and the hydrogen can be found by combustion.

The mass of hydrogen can be obtained as follows;

Number of moles of hydrogen =2.7 g/18 g/mol * 2 = 0.302 moles

Now the mass of hydrogen is obtained from;

0.302 moles * 1 g/mol = 0.302 g

Learn more about combustion of a compound:brainly.com/question/14272505

#SPJ1

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I uhhh would answer but this is actually confusing
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Answer:

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Explanation:

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Hydrocarbon weighing 112g is burned in air to produce 328.5 g of carbon dioxide what percent mass of carbon in the hydrocarbon
Lemur [1.5K]

Answer:

  • <u>80.0 %</u>

Explanation:

As per the law of conservation of mass all the mass of carbon present in the hydrocarbon weighing 112 g is present in the 328.5 g of carbon dioxide produced when the hydrocarbon was burned in air.

<u>1) Calculate the mass of carbon in 328.5 g of carbon dioxide</u>:

  • Chemical formula of carbon dioxide: CO₂
  • Molar mass of CO₂: 12.011 g/mol + 2 × 15.999 g/mol = 44.009 g/mol
  • Mass of C: x

            x / 328.5 g CO₂ = 12.011 g C / 44.009 g/mol ⇒ x = 86.65 g C

<u>2) Calculate the percent mass of carbon:</u>

  • % = (mass of carbon / mass of carbon dioxide) × 100 =

            = (89.65 / 112) × 100 = 80.04%

Round to three signifcant figures: 80.0%.

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The ratio of the heights 1.50 m and 75 cm of two persons can be written as ​
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