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Nadya [2.5K]
3 years ago
12

Please am confused and need help​

Chemistry
1 answer:
alex41 [277]3 years ago
3 0

Answer:

1.  C

2.  C

3.  A

4.  C

5.  True

6.  C

Explanation:

1. C  The answer is conduction because the heat was transferred through direct contact.

2. C  The answer convection because the heat was transferred through a medium (liquid/gas).

3. A  The answer is conduction because the heat was transferred through direct contact.

4. C  The answer is radiation because the heat was transferred through thermal emission.

5. True.  This is because the air that is warmed rises, causing the cool air to replace it.  You can picture it like the scenario in question 2.

6. C  

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Answer:

7.5 mol of hydrogen would be needed to consume the available nitrogen.

Explanation:

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  • firstly, we need to calculate the number of moles of both

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for N₂:

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<u>using cross multiplication</u>

1 mol of  N₂ needs → 3 mol of H₂

2.5 mol of  N₂ needs → ??? mol of H₂

∴ the number of mol of H₂ needed = (3*2.5) / 1 = 7.5 mol

So, the right choice is:

7.5 mol of hydrogen would be needed to consume the available nitrogen.

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