A mystery white powder is made up of 80% C, 8.33% H, and 11.67% N. What is its empirical formula?

Explanation:

We assume there is 100g of this first for simplicity. That means, there will be 80g of C, 8.33g of H, and 11.67g of N. Now, we need to find the moles of each:

C = 80/12.01 = 6.66

H = 8.33/1.008 = 8.26

N = 11.67/14.01 = 0.833

Then, we divide each one by the element with the lowest amount of moles which is N.

We get 6.66/0.833 = about 8 (this is for carbon)

We get 8.26/0.833 = about 10 (this is for hydrogen)

We get 0.833/0.833 = 1 (for Nitrogen)

Then we get the empirical formula

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

yes the answer is total mass in unchanged   : )