I have absolutely no idea how to do it and my teacher teach hecking fast too...
Zinc reacts with hydrochloric acid and hydrogen gas.If 130g of zinc reacted completely, calculate the volume of gas formed.
2 answers
my second try.
my third try.
What temperature? What pressure? I assume you want the volume at STP.
Step 1. Write and balance the equation.
Zn + 2HCl => ZnCl2 + H2
Step 2. Convert what you have (130 g Zn) to mols.
mols = grams/atomic mass = 130/65.4 = approx 2 but this is a close estimate. You should repeat ALL of these calculations.
Step 3. Using the coefficients in the balanced equation, convert mols of what you have (mols Zn) to mols of what you want (H2).
approx 2 mols Zn x (1 mol H2/1 mol Zn) = approx 2 mol H2 gas.
Step 4. Convert mols H2 gas to the unit you want (volume in L)
You know 1 mol of any gas at STP occupies 22.4 L so
approx 2 mols H2 x 22.4 L/mol = ? Liters.
What temperature? What pressure? I assume you want the volume at STP.
Step 1. Write and balance the equation.
Zn + 2HCl => ZnCl2 + H2
Step 2. Convert what you have (130 g Zn) to mols.
mols = grams/atomic mass = 130/65.4 = approx 2 but this is a close estimate. You should repeat ALL of these calculations.
Step 3. Using the coefficients in the balanced equation, convert mols of what you have (mols Zn) to mols of what you want (H2).
approx 2 mols Zn x (1 mol H2/1 mol Zn) = approx 2 mol H2 gas.
Step 4. Convert mols H2 gas to the unit you want (volume in L)
You know 1 mol of any gas at STP occupies 22.4 L so
approx 2 mols H2 x 22.4 L/mol = ? Liters.
2 answers