Question

How many grams of magnesium oxide can be produced when 97.2 g Mg react with 88.5 g O2? (4 points)

Unbalanced equation: Mg + O2 → MgO

Answer 1

@katkipe

Answer 2

^ lol

Answer 3

Our equation is 2Mg + O2=2MgO also 4Mg + 2O2=4MgO
Atomic mass of Mg is 24.3 & Molecular mass of O2 is 32 which means as per the balanced equation we require 48.6 gram of mg for every 32 gram of oxygen which gives us 2*(24.3+16) gram of MgO & for 97.2 gram of Mg we require 64 gram of oxygen which will give us 4*(24.3+16) ie. 161.2 gram of MgO.
Clearly oxygen in excess & Mg is a limiting reagent.
Thus we have 161..2 gram of MgO formed.

Answer 4

/X_x\

Answer 5

How are there two Mg??

Answer 6

How do you find Molecular Mass? @katkipe

Answer 7

Hang on. I am googleing some help.

Answer 8

Yep I dont know lol. I googled stuff. @Secret-Ninja Can you further help him?

Answer 9

@pooja195

Answer 10

http://openstudy.com/study#/updates/50ece916e4b07cd2b6492560

Answer 11

Thanks @pooja195 !

Answer 12

no problem :)

Answer 13

hey you changed your profile pic cx

Answer 14

She was referring to me... @pooja195 That didn't completely answer my question. I know how to balance the equations, I don't know how to do what it wants afterwards.

Answer 15

Hold on let me look

Answer 16

kk :)

Answer 17

What dont you get?

Answer 18

It wants to know how many grams of magnesium oxide can be produced when 97.2 g Mg react with 88.5 g O2. I think the answer is 97.2 Mg

Answer 19

Can you explain your answer?

Answer 20

Possibly. When 2 moles of magnesium reacts with 1 mole of oxygen gas, 2 moles of magnesium oxide will be formed. So let's say you mix 10 moles of Mg with 5 moles, you'll get 10 moles of MgO2.

Answer 21

Your correct :)

Answer 22

LoL thanks, it's hard to find people who don't just give you the answer. Anyone can google it, but others actually like to LEARN the information.

Answer 23

lol I hate giving direct answers and i dont want to get in trouble :) and your welcome

Answer 24

That problem was with Synthesizing. My next one is on Decomposition. Can you help me with that too?

Answer 25

yes post it again