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zmey [24]
3 years ago
7

In the equation:

Chemistry
1 answer:
Ksenya-84 [330]3 years ago
6 0

Answer:

B) 16 g

Explanation:

  • 2H₂ + O₂ → 2H₂O

First we <u>convert 4 moles of O₂ into moles of H₂</u>, using the <em>stoichiometric coefficients of the balanced reaction</em>:

  • 4 mol O₂ * \frac{2molH_2}{1molO_2} = 8 mol H₂

Finally we <u>convert 8 moles of H₂ into grams</u>, using <em>its molar mass</em>:

  • 8 mol H₂ * 2 g/mol = 16 g

Thus, the correct answer is option B).

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8 0
3 years ago
The mass of water in a single popcorn kernel was found to be 0.905 grams after it popped at a temperature of 175 °C. Using the i
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Answer:

0.583 kilojoules

Explanation:

The amount of heat required to pop a single kernel can be calculated using the formula as follows:

Q = m × c × ∆T

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In kilojoules i.e. we divide by 1000, the amount of heat is:

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3 years ago
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4 years ago
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How much force is required to accelerate an 8-kg wagon at a rate of 15 m/s
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Answer:

<h2>120 N</h2>

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3 years ago
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