please help me with all three questions. Thank you!....

please help me with all three questions. Thank you!

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0925/_1/overview/attempt/_24126213_1?courseld=_107059 Question 16 1 Point Liv is trying to decide which molecules to use for her chemistry reaction. The first thing she has to do is find the molar mass of each of the molecules she can potentially use. Calculate the molar mass of the molecules: C7HgN402 Use the editor to format your answer Question 17 1 Point The National Institute of Health (NIH) provides dietary recommendations for adults over various supplements. Convert the following recommendations for supplements over to mass or moles. A daily caffeine (CH10N402) of up to 400mg is considered safe for adults. Convert mg to moles for the molecule. Use the editor to format your answer Question 18 1 Point The National Institute of Health (NIH) provides dietary recommendations for adults over various supplements. Convert the following recommendations for supplements over to mass or moles, Selenium is vital for thyroid gland function and DNA production. The NIH recommends 5.5 x 105 g of Selenium. Convert g to molecules.

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