Chemistry help??? 10pts.?

Question

A 200.0 g sample of magnesium oxide contains 120.6 g of magnesium. How many grams of magnesium can be obtained from 332 g of magnesium oxide?

Please show steps so I can learn. Thanks!!1

Answer 1

Oh my, i was set this question as well!!!  but i got it right so yh! here goes........

Relative Atomic Mass periodic tables: Mg=24 O=16 MgO=40

332g MgO x 120.6g Mg/200.0g MgO

= 40039.2 / 200

= 200.196 Mg  this is to the six sig figgys

Answer 2

120.6g is to 200.0g as  X is to 332g.

120.6 / 200 = x / 332

200x = 120.6 * 332

200x =  40039.2

x = 40039.2 / 200

x = 200.196

I think this is correct.

Answer 3

It is simple

it is a ratio : 120.6/200=X/332

so X = 200.196 g which is the quantity of magnesium in 332 g magnesium oxide

Answer 4

Atomic weights: Mg=24  O=16  MgO=40

332gMgO x 120.6gMg/200.0gMgO = 199g Mg to three significant figures