HELO ME PLS I DONT FEEL LIKE DOING IT

Select the atomic models that belong to the same element

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

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.