An atom has 9 electrons and 9 protons at the start. if it loses 2 electrons, the net charge on the atom will be . if the atom instead gains 4 electrons, the net charge will be .

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

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.