4. Which of the following compounds would be expected to have the lowest melting point? a. AIF3 b. RbF c. NaF d. MgF2 e. CaF2

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Q: 20. How many domains are there around the central atom in H2O? A. 1 B. 2 C. 4 D. 3

A: To tell the number of domains around the central atom.

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A:

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Q: 71.844 g

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A: The solution is given below -

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A: the correct options are as follows:

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A: Please find your solution below : 34.