Balancing Chemical Reactions Practice

For the following equation, what is the coefficient for LiCl?

___LiBr + ___Cl₂ --> ___Br₂ + ___LiCl

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-5

Balance the following equation: Cr(s) + Fe(NO₃)₂ (ag) → Fe(s) + Cr(NO₃)₃ (ag)

• 2,3,3,2

• 2,3,2,3

• 4,6,6,2

• 1,3,3,1

Tags

NGSS.MS-PS1-5

When balancing chemical equations online, you will need to use scratch paper to write/copy the equation so you can balance. Do you have a sheet of scratch paper in front of you and understand that you need to use the scratch paper when balancing?

• Yes

• No

What is the first step in balancing chemical equations?

• Balancing hydrogen

• Balancing metals

• Balancing oxygen

• Balancing non-metals

What is the correct equation?

• Na + HNO3 => NaNO3 + H2

• 2Na + HNO3 => NaNO3 + H2

• 2Na + 2HNO3 => NaNO3 + H2

• 2Na + 2HNO3 => 2NaNO3 + H2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation, CaCO₃(s) → CaO(s) + CO₂(g)?

• 3,1,2

• 1,1,1

• 1,3,1

• 2,6,3

Tags

NGSS.MS-PS1-5

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled

• the product is half the mass of the reactants

• the mass is the same

• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

According to the law of conservation of mass, how much mercury was present in the mercury (II) oxide?

• 55.8 g

• 64.2 g

• 60.0 g

• 126.0 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation:  H₂ + N₂ → NH₃

•  H₂ + 4N₂ → NH₃

•  H₂ + 3N₂ → 2NH₃

•  3H₂ + N₂ → 2NH₃

•  2H₂ + 2N₂ → 2NH₃

Tags

NGSS.MS-PS1-5

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

• 1,3,3,1

• 1,3,2,1

• 2,3,3,1

• 1,1,3,1

Tags

NGSS.MS-PS1-5