What is the molarity of NaNO, when 250 ml of 0.750 M NaNO, is boiled down to 175 ml?

Much like a dozen is equal to 12 (this could be doughnuts, eggs, people, etc.), one mole is equal to 6.022 x 1023 atoms, molecules, electronsExplanation:

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;