For the reation: C3H8+5 02 =3 CO2+4 H2O
How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8
To determine the number of moles of C3H8 required to produce 3.60 grams of H2O, you need to use the balanced equation and molar masses of the compounds involved.
First, let's calculate the molar mass of H2O:
H = 1 g/mol (2 hydrogen atoms)
O = 16 g/mol (1 oxygen atom)
Molar mass of H2O = 1(2) + 16 = 18 g/mol
Next, convert the given mass of H2O to moles:
moles of H2O = mass of H2O / molar mass of H2O
moles of H2O = 3.60 g / 18 g/mol
moles of H2O = 0.20 mol
According to the balanced equation, 1 mole of C3H8 produces 4 moles of H2O. So, the ratio between C3H8 and H2O is 1:4.
Now, calculate the moles of C3H8 required:
moles of C3H8 = (moles of H2O) / (moles of H2O produced by 1 mole of C3H8)
moles of C3H8 = 0.20 mol / 4
moles of C3H8 = 0.05 mol
Therefore, the correct answer is that 0.05 moles of C3H8 are needed to make 3.60 grams of H2O, not 44.8 moles.