1. The molarity of a solution of 6.0 g of KCl in 80. mL of solution is

1.0 M of KCl

Explanation:

First off, we're given 6.0 g of KCl. From here, we just find the molar mass of KCl by adding the molar masses of each element in the compound. The molar mass for the potassium is 39 g/mol, and the chlorine is 34 g/mol (all found on periodic table). We add those to find the compounds molar mass, which turns out to be 73 grams/ mole.

From here, we need to convert grams to moles so we multiply the grams by the molar mass so that we cancel out grams and only leave behind moles ( 6.0 grams x  1 mole/73 grams ≈ 0.08 moles).

From here, we need to find the amount of liters in the solution, considering that the Molarity (M) is the same equation as mol/ Liter. To find this, we must convert similar units so that they work, in this case, we must convert milliliters to liters. We know that 1000 milliliters are equal to 1 liter, therefore like what we did with the molar mass and grams, we must cancel out milliliter so we only have liters ( 80 mL  x  1 L / 1000 mL= 0.08 L)

From here, we divide the moles by the liters in order to make the molarity. The reason why is because as said before, M is equal to mol/L  

(0.08 moles / 0.08 L = 1.0 M)

I hope this helped you and good luck with your semester in Chemistry!

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: