Chemistry

posted by .

How many grams of nitrogen are required to react with 2.79g of hydrogen to produce ammonia?
A) 25.8 g B) 13.0 g C) 78.2 g D) 38.7 g E) 77.4 g

I get the answer as 38.7 but it is meant to be B
I did 2.79g x 3molH2/2.016g/mol x 1molN2/3molH2 x 28.02g/mol/1moleN2

  • Chemistry -

    Whats the equation to form NH2?

    N2 +3H2 -----> 2NH3


    So, you need 3 moles of H2 gas for 1 mole of N2:

    How many moles of hydrogen are present in 2.79 g of Hydrogen?


    2.79 g of H2*(1 mole/2.016g)=1.384 moles of H2

    1.384 moles of H2 requires how many moles of N2?

    1.384 moles of H2*(1 mole of N2/3 moles of H2)=0.4613 moles of N2

    0.4613 moles of N2*(28.014g/mole)=12.9 g of N2=13.0g of N2.


    I do it in steps when explaining. Also, it is better for accounting reasons in order to find errors. But you could do it all in one step, and you should still get the same answer:

    2.79 g of H2*(1 mol/2.016g)*(1 mol N2/3 mol of H2)*(28.014g/mole)= 13.0g of N2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    nitrogen and hydrogen react in the haber process to form ammonia. All substances are in the gas phase. If 0.385atm of nitrogen and 0.792 atm of hydrogen react, what is the partial pressure of ammonia(in mmHg) when this reaction goes …
  2. chemistry

    How many grams of ammonia are formed when 1.34 grams of nitrogen react with an excess of hydrogen(3 H2 + N2 reacts to form 2 NH3)(Answer to tenths ex. 2.5)?
  3. chemistRY

    When you react hydrogen gas with nitrogen gas to form ammonia, How many grams of all species ( reactants and products) are left when you start with 140 grams of nitrogen and 40 grams of hydrogen?
  4. chemistRY

    When you react hydrogen gas with nitrogen gas to form ammonia, How many grams of all species ( reactants and products) are left when you start with 140 grams of nitrogen and 40 grams of hydrogen?
  5. Chemistry

    The Haber process is used to synthesize ammonia from hydrogen and nitrogen. How much hydrogen is required to produce 42.8 kg of ammonia?
  6. chenistry

    this is confusing me so bad!! Nitrogen gas reacts with hydrogen gas to produce ammonia by the following equation: N2(g)+3H2(g)→2NH3(g) If you have 5.79g of H2, how many grams of NH3 can be produced?
  7. chemistry

    When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 …
  8. chemistry

    When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 …
  9. chemistry

    QUESTION 10 Ammonia gas is formed from nitrogen gas and hydrogen gas according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 112 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to …
  10. chemistry

    QUESTION 11 Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 84.0 g of nitrogen gas is allowed to react with an excess of hydrogen gas to produce …

More Similar Questions