Question

hey guys. I have a chemistry question...anyone want to help? I have raw data and then calculation questions..? calculating the number of Mg and O2 in a product.

Answer 1

complete the question plz

Answer 2

ok. i have the mass of Mg and O2 = .485 and the mass of O2 = 36.033

Answer 3

i have to calculate the number of moles in the Mg and the number of moles in O2. I know how to convert the moles. But Im not sure I got the masses right.

Answer 4

U DOIT ILL CHECK

Answer 5

A crucible and lid weighs 17.773g. My Mg weighs .296g. and after heated Mg into the crucible, my crucible, lid, and Mg weighs 18.260g. After heated and cooled again, my crucible, lid and Mg weighs 18.258g.

Answer 6

so, to calculate the mass of the product containing Mg and O2, I took 18.258-17.773 and got 0.485g for my answer

Answer 7

then to calculate the mass of O2, i took 17.773+18.260 and got 36.033

Answer 8

to calculate the moles: I took 36.033 O2 and divided it by 16.00= 2.25 mol oxygen.

Answer 9

then, to calculate the moles of Mg: I took 0.296 divided by 24.31= 0.012 mol Mg.

Answer 10

Does this look correct??

Answer 11

Okay so in this post: "A crucible and lid weighs 17.773g. My Mg weighs .296g. and after heated Mg into the crucible, my crucible, lid, and Mg weighs 18.260g. After heated and cooled again, my crucible, lid and Mg weighs 18.258g." When you say "Mg" do you mean your product containing both Mg and O2?

Also this: "then to calculate the mass of O2, i took 17.773+18.260 and got 36.033" doesn't sound right, why did you add the mass of the crucible?

Answer 12

Also there is a chemistry section :) Right here: http://openstudy.com/groups/chemistry (you can also access it by clicking "view all groups" on the bottom of the blue box on the homepage).