given the balaced equation representing a reation: 2H2 + 02 arrow 2H20 what is the mass of H20 preoduced when 10.0 grams of H2 reacts completely with 80.0 grams of 02? 1.  70.0g 2.  90.0g 3....

given the balaced equation representing a reation: 2H2 + 02 arrow 2H20

what is the mass of H20 preoduced when 10.0 grams of H2 reacts completely with 80.0 grams of 02?

1.  70.0g

2.  90.0g

3. 180.g

4. 800.g

Expert Answers
justaguide eNotes educator| Certified Educator

The chemical equation between hydrogen and oxygen is `2H_2 + O_2 -> 2H_2O` .

Two mole of water is produced when 2 moles of hydrogen and one mole of oxygen react with each other. The molar mass of hydrogen is 2 and the molar mass of oxygen is 32. The molar mass of water is 18.

10 g of `H_2` is equivalent to 5 moles of hydrogen and 80 grams of oxygen is equivalent to 5 moles of oxygen. The number of moles of water produced is 5. This is equivalent to 90 g of water.

The correct answer is option 2.

parama9000 | Student

XgH2O/2(2+16)=80gO2/(2X16)

Still 90gH20

parama9000 | Student

The correct answer is option 2.

parama9000 | Student

XgH20/2(2+16)=10gH2/2x2=90gH20

Yojana_Thapa | Student

XgH2O/ 2(2+16) = 10gH2 / 2(2)

  • Cross multiply and you get 90gH2O

XgH2O/ 2(2+16) = 80gO2/ (2x16)

  • Cross multiply and you get 90gH2O