What is the explanation for the net charge on a polyatomic ion

The difference between atomic mass and molar mass

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.