Quizizz Miderm Review Questions

Why is balancing chemical equations necessary?

• It changes the identity of reactants.

• It follows the Law of Conservation of Mass.

• It reduces reaction speed.

• It removes limiting reactants.

Tags

NGSS.HS-PS1-7

Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.HS-PS1-7

Balance the following reaction: ___ N₂ + ___ H₂ → ___ NH₃

• 1, 2, 3

• 1, 3, 2

• 2, 3, 1

• 3, 1, 2

What is the missing coefficient in this equation? C₃H₈ + __ O₂ → 3CO₂ + 4H₂O

• 5

• 6

• 7

• 8

Given the equation: 2H₂ + O₂ → 2H₂O, if you have 4.0 moles of hydrogen gas, how many moles of water can be produced?

• 1.0 mole

• 2.0 moles

• 4.0 moles

• 8.0 moles

Tags

NGSS.HS-PS1-7

How many grams of O₂ are needed to fully react with 6.00 grams of H₂ in this equation? (H₂ + O₂ → H₂O)

• 6.00 g

• 48.00 g

• 32.00 g

• 3.00 g

Tags

NGSS.HS-PS1-7

If you start with 2.00 moles of nitrogen gas (N₂), how many moles of ammonia (NH₃) can be produced in this equation? N₂ + 3H₂ → 2NH₃

• 1.00 mole

• 4.00 moles

• 3.00 moles

• 6.00 moles

A reaction requires 4.00 moles of reactant A, but only 3.00 moles are available. What happens?

• The reaction produces excess product.

• Reactant A is the limiting reactant.

• The reaction speeds up.

• Reactant A becomes excess.

Tags

NGSS.HS-PS1-7

Given: 2Al + 3Cl₂ → 2AlCl₃, if 5.00 g of Al reacts with 10.00 g of Cl₂, which reactant is limiting?

• Aluminum (Al)

• Chlorine gas (Cl₂)

• Both reactants

• Neither reactant

A reaction between magnesium and oxygen forms MgO. The limiting reactant is fully used. What happens?

• No more product forms.

• The reaction continues infinitely.

• New reactants appear.

• Oxygen gas increases.