Formula and Equations

Is this equation balanced?

• Yes

• No

The law of conservation of mass says substances can neither be _______ nor ___________.

• Built; torn down

• Blended together; separated

• Created; destroyed

• Condensed; extracted

Is this equation balanced?

• Yes

• No

Translate the word equation below:

Nitrogen (N₂)reacts with Hydrogen (H₂) to form Ammonia (NH₃).

Is this equation balanced?

• Yes

• No

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have?

• 4g

• 5g

• 9g

• 14g

How many elements are represented in the products in the equation?

• 2

• 3

• 4

• 5

Magnesium (Mg) can be burned in oxygen (O₂) to produce solid magnesium oxide (MgO).

• Mg(s) + O₂(g)→ MgO(s)

• Mg(s) + O(g) → MgO(s)

• Mg(s) + CO₂(g) → MgO(s) + C(s)

• Mg(s) + O₂(g) → Mg₂O₂(s)

Look at the picture above. If the bucket were left outside on a hot day but brought inside before any evaporation occurred, how would the mass be affected?

• There would be no mass.

• The mass would be less.

• The mass would be greater.

• The mass would not be affected.

In the equation shown, what are the product(s)?

• N₂ + H₂

• NH₃