2. What is the molality of a solution in which 25 g of NaCl is dissolved in 20 kg of
water?

0.21 m

Explanation

25  NaCl * 1 mole/58.44 g NaCl * 1/20 kg = 0.21 m

it is important to conserve water because there is very limited amount of freshwater here on earth and if we are not smart about how we use it we will only be runnning out of our supply faster than neccessarry.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.