
Jake R. answered 05/30/21
Patient and Knowledgeable Dental Student Effective in Test Prep Skills
Hi,
- Our equation reads: 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2O
- The numbers in the equation show how many moles are converted, so 3 moles of CuO would produce 1 mole of N2.
- Continuing this relationship shows that 11.8 moles of CuO yields 3.93 moles of N2.
- N2 indicates that there are two Nitrogen atoms, so our total molar mass for N2 is (14*2) or 28 grams.
- We multiple the number of grams in a mole of N2 by the number of moles for our final answer.
- 28*3.93 = 110.1 grams
- Our equation reads: C + 2H2 -> CH4 and we need to know how many grams of hydrogen produce 14.9 moles of CH4.
- First, find the molar mass of Hydrogen, which is 1 gram. For H2 this would be 2 grams.
- Apply this to the equation, so 2H2 indicates that 2 moles of H2 are used when 1 mole of CH4 is produced.
- 14.9 moles of methane then requires 14.9 * 2 moles of H2, or 29.8 moles of H2 total.
- Each mole of H2 has a mass of 2 grams, 29.8 * 2 grams = 59.6 grams of Hydrogen.