Please help and if u dont know that ok but pleas don't give me the wrong answer

Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3no2(g)+h2o(l)→2hno3(l)+no(g) part a suppose that 4.2 mol no2 and 0.50 mol h2o combine and react completely. which reactant is in excess? express your answer as a chemical formula. nothing

An observation that requires measurement is called quantitative observable or qualitative

What is the mass of 0.46 mil of mgcl2