Question

How many grams of H2 are required to produce 7.50 grams of ammonia NH3? Use the balanced equation (this time the equation is already balanced):

N_2 (g)+3H_2 (g)⟶2NH_3 (g)

10. If 54.7 grams of propane (C3H8) and 89.6 grams of oxygen (O2) are available in the balanced combustion reaction below:
C_3 H_8+5O_2⟶3CO_2+4H_2 O

Answer 1

[AI-generated answer — Bot GPT 3.5]

To determine how many grams of H2 are required to produce 7.50 grams of ammonia NH3, we need to use the stoichiometry of the balanced equation.

From the balanced equation:
1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3.

First, we need to convert 7.50 grams of NH3 to moles:
7.50 grams NH3 * (1 mole NH3 / molar mass NH3) = moles of NH3

Next, using the stoichiometry of the balanced equation, we can determine the number of moles of H2 required to produce the calculated moles of NH3:
moles of NH3 * (3 moles H2 / 2 moles NH3) = moles of H2

Finally, we can convert the moles of H2 to grams:
moles of H2 * molar mass H2 = grams of H2

Keep in mind that molar mass NH3 = 17.031 grams/mol and molar mass H2 = 2.016 grams/mol.

For the second question,

Using the balanced equation:
1 mole of C3H8 reacts with 5 moles of O2 to produce 3 moles of CO2 and 4 moles of H2O.

First, we need to convert the given amounts of C3H8 and O2 to moles:
54.7 grams C3H8 * (1 mole C3H8 / molar mass C3H8) = moles of C3H8
89.6 grams O2 * (1 mole O2 / molar mass O2) = moles of O2

Next, using the stoichiometry of the balanced equation, we can determine the moles of CO2 and H2O produced:
moles of C3H8 * (3 moles CO2 / 1 mole C3H8) = moles of CO2
moles of O2 * (3 moles CO2 / 5 moles O2) = moles of CO2 (alternative calculation)
moles of C3H8 * (4 moles H2O / 1 mole C3H8) = moles of H2O
moles of O2 * (4 moles H2O / 5 moles O2) = moles of H2O (alternative calculation)

Finally, convert the moles of CO2 and H2O produced to grams:
moles of CO2 * molar mass CO2 = grams of CO2
moles of H2O * molar mass H2O = grams of H2O

Keep in mind that molar mass C3H8 = 44.096 grams/mol, molar mass O2 = 31.998 grams/mol, molar mass CO2 = 44.01 grams/mol, and molar mass H2O = 18.02 grams/mol.