WorksheetsAdvanced Practice on Limiting and Excess Reactants
Total questions: 11
Worksheet time: 43mins
1-9.
Answer the questions below after watching the video
What information is needed to convert the mass of a reactant to moles?
The volume of the reactant
The molar mass of the reactant
The boiling point of the reactant
The density of the reactant
What role does the stoichiometry of a reaction play in determining the limiting reactant?
It indicates the physical states of the reactants and products
It determines the color of the final product
It dictates the mole ratio of reactants required for the reaction
It calculates the density of the reactants
What defines a limiting reactant in a chemical reaction?
The reactant that produces the maximum amount of product
The reactant that has the highest molar mass
The reactant present in the highest quantity
The reactant that is completely consumed first
Why is it important to identify the limiting reactant in a chemical reaction?
To understand the viscosity of the reactants
To calculate the temperature change during the reaction
To predict the color change of the reaction mixture
To determine the maximum amount of product that can be formed
In the context of the given reaction, why is chlorine considered the limiting reactant?
Because it has a higher molar mass than aluminum
Because it is a gas at room temperature
Because it is present in a lesser amount than required
Because it reacts more slowly with aluminum
How is the maximum amount of product determined in a reaction involving a limiting reactant?
By measuring the physical state of the reactants
By using the amount of the limiting reactant
By calculating the amount of product from the excess reactant
By using the molar mass of the excess reactant
What happens to the excess reactant in a chemical reaction after the reaction is complete?
It remains unchanged and can be recovered
It is completely consumed along with the limiting reactant
It is converted into a by-product
It disappears without a trace
How can the leftover amount of the excess reactant be calculated after the reaction?
By measuring the volume of the reaction mixture
By adding the amount of limiting reactant used to the initial amount
By subtracting the amount used from the initial amount
By calculating the molar mass of the product
What is the significance of the molar mass of a compound in calculating the mass of a product in grams?
It is necessary for converting moles of the product to grams
It helps in determining the color of the product
It indicates the boiling point of the product
It is used to calculate the volume of the product formed
Avogadro's number tells us (a) . This number is (b) . In order change the number of molecules into the number of moles we use the number of molecules (c) Avogadro's number. If we want to go the opposite direction and change the number of moles to the number of molecules, we use the number of moles (d) Avogadro's number.
To convert molecules to moles, you need to (a) (b) by Avogadro's number. To convert moles to molecules, you need to (c) (d) by Avogadro's number.
How many grams are in 0.25 moles of CuSO 4 ?
31.75 g
63.50 g
15.88 g
95.25 g
How many grams are in 2.5 moles of KCl?
186.45 g
74.55 g
93.25 g
148.10 g
In the reaction N2+3H2→2NH3 , how many moles of NH3 are produced from 14 grams of N2 ? (Molar mass of N2 = 28 g/mol)
1 mol
2 mol
3 mol
4 mol
For the reaction CO 2 + 2H 2 -> CH 4 + O 2 , how many moles of methane (CH 4 ) can be produced from 3 moles of hydrogen gas (H 2 )?
0.5 moles
1 mole
1.5 moles
3 moles
