Is the world really going to end saturday

For the following reaction, 5.65 grams of oxygen gas are mixed with excess hydrochloric acid . assume that the percent yield of water is 86.4 %. hydrochloric acid(aq) + oxygen(g) water(l) + chlorine(g) what is the ideal yield of water ? grams what is the actual yield of water ? grams

The first element on the periodic table of elements is carbon. a. true b. false

Which factor is likely to impact the possible number of compounds ?