12. for one of your samples of magnesium, use the balanced chemical equation to convert the mass of magnesium to the number of moles of hydrogen gas evolved, nh2. use the ideal gas law to convert nh2 to the volume of hydrogen gas produced, videal assume that the temperature of the gas inside the buret is equal to room temperature (tgas = troom) and the pressure of the gas inside the buret is equal to atmospheric pressure in the room (pgas = patm). show your work.

12 is it do you think so

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o