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:

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Normal metals such as $Pb^{2+} and Pb^{4+}$ also show variable valencies. Certain non-metals are also found to show more than one valence state $Pb^{3+} and Pb^{5+}.$

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