Isotopes of an element have 2 things that change. What are they?

To calculate the molarity of a solution, you need to know the moles of solute and the

Asolution is made by dissolving 2.3 moles of sodium chloride (nacl) in 0.155 kilograms of water. if the molal boiling point constant for water (kb) is 0.51 °c/m, what would be the boiling point of this solution? show all the steps taken to solve this problem.

+= + + balance the equation on coefficients, ex. 1,1,1