What is the % by mass of Na2SO4 in a solution that contains 65.2 g Na2SO4 dissolved in 350 mL H2O?

The closer the atoms are to becoming ionic the more highly dense the negatively charged side gets.

Answercreating graphs and performing calculations;

B.1 - hydrogren-1 can only mean there is 1 neutron. it's obvious there is 1 proton or else it wouldn't be hydrogen, so they wouldn't put a number after it unless they were indicating the number of neutrons

For a collision to be successful you need 2 different objects