PLEASE HURRY I WILL GIVE BRAINLIEST My Chemistry test that is timed! and please show work! I will give BRAINLIEST
Find the mass in grams of 3 x 10²³ molecules of F₂.
What is the percent composition of NiO, if a sample of NiO with a mass of 41.9 g contains 33.1g Ni and 8.8 g O?
What is the percent by mass of hydrogen in aspirin, C₉H₈O₄?
Calculate the molecular formulas of the compounds having the following empirical formulas and molar masses: C₂H₅, 58 g/mol; CH, 78 g/mol; and HgCl, 236.1 g/mol.
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