- Section 1
| 21. |
What are the number of moles of CO2 which contains 16 g of oxygen? |
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| 22. |
The main use of salt in the diet is to |
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| 23. |
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is |
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| 24. |
The luster of a metal is due to |
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