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Umnica [9.8K]
3 years ago
14

What is the cathode ray? How was the Nature of cathode rays determined?​​

Chemistry
1 answer:
podryga [215]3 years ago
6 0

Answer:

Cathode rays are streams of electrons observed in discharge tubes. In 1897, British physicist J. J. Thomson showed that cathode rays were composed of a previously unknown negatively charged particle, which was later named the electron. Cathode-ray tubes (CRTs) use a focused beam of electrons deflected by electric or magnetic fields to render an image on a screen.

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2b. 12 grams of C8H18 react with oxygen to produce carbon dioxide and water. How many grams of CO2 are produced?
likoan [24]

Answer:

37.1g are produced

Explanation:

The combustion of C₈H₁₈ is:

C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O

<em>Where 1 mole of C₈H₁₈ produce 8 moles of CO₂</em>

<em />

To find the mass of CO₂ that is produced we need to convert the mass of C₈H₁₈ with molar mass. Then, with the chemical equation, we can find the moles of CO₂ and its mass, as follows:

<em>Moles C₈H₁₈ -Molar mass: 114.2g/mol-</em>

12g C₈H₁₈ * (1mol / 114.2g) = 0.105 moles of C₈H₁₈

<em>Moles CO₂:</em>

As 1 mole of C₈H₁₈ produce 8 moles of CO₂, 0.105 moles of C₈H₁₈ produce:

0.105 moles of C₈H₁₈ * (8moles CO₂ / 1mole C₈H₁₈) = 0.84 moles of CO₂

<em>Mass CO₂ -Molar mass: 44.01g/mol-:</em>

0.84 moles of CO₂ * (44.01g / mol) = 37.0g of CO₂ ≈

<h3>37.1g are produced</h3>
4 0
3 years ago
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