Cool Dom

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Questions

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What is the percentage of oxygen in____? Mg(OH)2

Thanks Damon i got a couple more lolz 2.Determine the formula mass of (NH4)2C4H4O6

3.Empirical formula is C4H5N2O.Its molecular weight is 194.19g/mole.The "empirical formula weight is about 97.1g/mole.What is the molecular formula ?

4.A compund is found to have(by mass)48.38% carbon,8.12% hydrogen and the rest oxygen.(What % is missing to make the sum 100 %?) That is,figure % oxygen.What is its empirical formula?

THIS TEST IS DUE IN 15 MINS AND I JUST NEED HELP ON HOW TO DO IT LIKE THE STEPS FOR THEM ??

Answers

The following answers were posted by visitors named Cool Dom.