Urgent please help need it ASAP

In general metals get as you move from left to right across the periodic table.

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.

How does science use models to gain a better understanding of concepts?