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Category > Chemistry Posted 19 Jun 2017 My Price 4.00

mass of oxygen

What mass of oxygen will react with 2.64 g of Magnesium?

 

Formula: 2Mg(s)+O2(g)⟶MgO(s)

 

 

I know I am missing a step here, but not sure what. 

So far I have done the following:

2 g H | 1 mole  | 2 moles H2O  | 18 g
      | 1.007 g | 2 moles of H | 1 H2O

 

(2g∗1∗2∗18g)/(1.007∗2)=35.7g

 

(1.94g∗100%)/35.7= I got 5.4%

 

But the answer is 86%.

 

Please show me what I did wrong and how to work this. Thanks

Answers

SuperTutor
(15)
Status NEW Posted 19 Jun 2017 12:06 AM My Price 4.00

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