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

Find the mass in grams of 1.37x1020 particles of h3po4

What is the percentage of hydrogen in nitrogen trihydride

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.