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Which of the following are synthesis reactions?  1)  CH4 (g)  +  O2 (g)  ®  CO2 (g)  +  H2O (l) 2)  CaO (s)  +  CO2 (g)  ®  CaCO3 (s) 3)  Mg (s)  +  O2 (g)  ®  MgO (s)  4)  PbCO3 (s)  ®  PbO (s)  +  CO2 (g)

Convert: 9.03 x 10^22 molecules NH3 = ____ mol NH3

Calculate the percentage composition (by mass) of Mg in Mg3(AsO4)2.

If 4mol of nitrogen reacts with 9mol of hydrogen, according to the given equation, how many moles of ammonia are formed?    N2 + 3H2 –> 2NH3

What is the molar mass of nitroglycerin, C3H5(NO3)3?

Which of these combats viral replication by utilizing inactive viruses in the development of antibodies?

Which of the following substances is the oxidizing agent in the chemical reaction?​PbCl4 + SnCl2 → PbCl2 + SnCl4

Which of the following processes best describes a beta decay?

Compared with a solution that has a pH of 2.00, a solution that has a pH of 4.00:

Which of these is the correct formula for sodium phosphide?