Mass to Mass Stoichiometry Practice

What is the balanced equation for the combustion of B₂H₆?

• B₂H₆ + 3O₂ → 2HBO₂ + 2H₂O

• B₂H₆ + 4O₂ → 2B₂O₃ + 6H₂O

• 2B₂H₆ + 9O₂ → 4B₂O₃ + 6H₂O

• B₂H₆ + 2O₂ → B₂O₃ + 3H₂O

How do you calculate the mass of a product formed in a reaction?

• Use the balanced equation to find the mole ratio, convert moles of the reactant to moles of the product, and then convert moles of the product to grams.

• Add the masses of all reactants together to find the mass of the product.

• Multiply the volume of the reactant by its density to find the mass of the product.

• Use the initial temperature of the reactants to determine the mass of the product.

Tags

NGSS.HS-PS1-7

What is the molar mass of O₂?

• 28.02 g/mol

• 32.00 g/mol

• 30.01 g/mol

• 34.00 g/mol

Tags

NGSS.HS-PS1-7

What is the balanced equation for the reaction of sodium with water?

• Na + H₂O → NaOH + H₂

• 2Na + H₂O → NaOH + H₂

• 2Na + 2H₂O → 2NaOH + H₂

• Na + 2H₂O → 2NaOH + H₂O

How do you convert grams to moles?

• Multiply the mass of the substance by its molar mass.

• Add the mass of the substance to its molar mass.

• Divide the mass of the substance by its molar mass.

• Subtract the molar mass from the mass of the substance.

Tags

NGSS.HS-PS1-7

What is the mole concept?

• A unit of measurement in chemistry that represents 6.022 x 10²³ particles.

• A method for calculating the mass of a substance.

• A technique for measuring temperature in chemical reactions.

• A way to determine the volume of gases at standard conditions.

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-5

What is the balanced equation for the reaction of aluminum with sulfuric acid?

• 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂

• 4Al + 6H₂SO₄ → 2Al₂(SO₄)₃ + 6H₂

• Al + H₂SO₄ → Al₂(SO₄)₃ + H₂

• 3Al + 3H₂SO₄ → Al₃(SO₄)₃ + 3H₂

What is stoichiometry?

• A method for measuring temperature in chemical reactions.

• The branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

• A technique used to separate mixtures into their individual components.

• The study of the rates of chemical reactions.

What is the molar mass of Al₂(SO₄)₃?

• 320.00 g/mol

• 342.15 g/mol

• 300.50 g/mol

• 350.25 g/mol

How do you calculate the amount of hydrogen produced in a reaction?

• Use the balanced equation to find the mole ratio between the reactant and hydrogen, convert moles of the reactant to moles of hydrogen, and then convert moles of hydrogen to grams.

• Calculate the total mass of all reactants and divide by the molar mass of hydrogen.

• Measure the volume of hydrogen gas produced at standard temperature and pressure.

• Use the initial concentration of reactants to determine the amount of hydrogen produced.