1. Questions

chemistry

N2 + 3H2 --> 2NH3

how many grams of hydrogen are needed to react with 50 grams of nitrogen?


Three moles of H2 per one mole of N2. How many moles of N2 is 50 grams?


1.79 moles is 50 grams.


You do these problems in steps.
Step 1. Write a balanced chemical equation. You have that.

N2 + 3H2==> 2NH3

Step 2. Convert grams of what you have to mols remembering that mols = g/molar mass. mols N2 = 50/28 = 1.79.

Step 3. Convert mols of what you have (in this case N2) to mols of what you want (in this case H2) using the balanced equation from step 1. The coefficients do the trick if you make the units cancel.
mols H2 = 1.79 mols N2 x [3 mols H2/1 mol N2] = ?? mols H2.
Note that mols N2 cancel leaving you with mols H2 (and mols H2 is what you want)
.
Step 4. Now convert mols of what you want (from step 3) into grams using the formula from step 2 but in reverse; i.e., mols = g/molar mass and solving for g = mols x molar mass. You have mols and you use the molar mass of H2 which is 2.
g H2 = mols H2 x molar mass H2 = xx g H2 or, to watch the units;
g H2 = mols H2 x [2g H2/1 mol H2] = xx g H2.

Check my work. Check the numbers. I rounded to use whole numbers for molar masses. I hope this helps.

  1. 👍
  2. 👎
  3. 👁
Hawk

  1. 282

    1. 👍
    2. 👎
    blah

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    2. Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g) + 3H2(g) à 2NH3(g) o a. How many moles of H2 are needed to react with 1.0 mol of N2? o b. How many moles of N2 reacted if 0.60 mol of NH3 is produced? o c.

  2. stoichiometry

    How many moles of hydrogen are needed to completely react with 2.0 moles of nitrogen? N2 + 3H2 -- 2 NH3

  3. Chemistry

    Nitrogen & hydrogen goes react to form ammonia gas as follows: N2(g)+3H2(g)-->2NH3(g) At a certain temperature & pressure, 1.2L of N2 reacts with 3.6L of H2. If all the N2 and H2 are consumed, what volume of NH3, at the same

  4. chemistry

    Ammonia, NH3, can be made by reacting nitrogen with hydrogen. N2 + 3H2 = 2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react with enough N2? Please help!

  1. chemistry

    the reaction of N2+3H2-->2NH3 is used to produce ammonia commercially. if 1.40 g of N2 are used in the reaction, how many grams of H2 will be needed?

  2. chemistry

    3H2+N2=2NH3 if 2.70 g of H2 reacts with jugful of N ,how many grams of NH3 is formed?

  3. Chemistry

    Hello, I was hoping that I could get some help with calculating the mass needed to completely react with this question. In the following chemical reaction between H2 and N2 to produce NH3, what is the mass of N2 needed to

  4. chem h

    Methanol (CH3OH) is used in the production of many chemicals. methanol is made by reacting carbon monoxide and hydrogen at high temperature and pressure. CO(g) + 2H2(g) ==> CH3OH(g) a) How many moles of each reactant are needed to

  1. Chemistry

    Methanol (CH3OH) is used in the production of many chemicals. methanol is made by reacting carbon monoxide and hydrogen at high temperature and pressure. CO(g) + 2H2(g) ==> CH3OH(g) a) How many moles of each reactant are needed to

  2. Chem-Gas Stoichiometry

    N2+3H2->2NH3 What volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia? (assume constant temp. and pressure.)

  3. Chemistry

    N2(g) + 3H2(g)  2NH3(g) at STP How many litres of ammonia gas is produced using 5 litres of H2? N2 + 3H2 ---> 2NH3 - the ratio between H2 and NH3 is 3 : 2 - it's given 5 litres of H2, so the volume of NH3 formed is 5/3*2 = 10/3

  4. Chemistry

    N2 + 3H2 --> 2NH3 how many grams of ammonia is produced in the reaction?

You can view more similar questions or ask a new question.