What is the percent by mass of nacl in a solution containing 3.6 g nacl dissolved in water to make a 100.0 ml solution? (hint: 1 ml of water = 1 g of water)
a.0.035%
b.3.5%
c.3.6%

The answer is c.3.6%.

If:           1 mL of water = 1 g of water
Then:    100 mL of water = 100 g of water

Now, 100 g of the solution is 100%. 3.6 g of NaCl is x.
100 g : 100% = 3.6 g : x

After crossing the products:
x = 100% * 3.6 g : 100 g
x = 3.6%

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.