LCM Quiz Review (SPS3.ab)

The drawing shows solid carbon dioxide changing into carbon dioxide gas. Which statement describes the relationship between the solid carbon dioxide and the carbon dioxide gas after all of the solid has changed to gas?

• They have the same volume.

• The gas has less volume than the solid.

• They have the same mass.

• The gas has less mass than the solid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

When heated, mercuric oxide decomposes to form liquid mercury and oxygen. A scientist heated 10 grams (g) of mercuric oxide and formed 9.3 grams of liquid mercury. How many grams of oxygen were formed?

• 0.7 g

• 9.3 g

• 10.0 g

• 19.3 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Sodium sulfate and barium chloride react with each other to form sodium chloride and barium sulfate as shown. Which statement MOST accurately describes the mass of the reactants compared to the mass of the products?

• The mass of the reactants is the same as the mass of the products.

• The products have a greater mass because matter was created during the reaction.

• The reactants have a greater mass because some of the mass was converted to heat.

• The reactants have a greater mass because some matter was destroyed by the reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?

• Mg + HC1 --> H₂ + MgCl₂

• H₂O + CO₂ --> H₂CO₃

• KC1O₃ --> KC1 + O₂

• H₂ + O₂ --> H₂O

Tags

NGSS.MS-PS1-5

If a chemical reaction occurs in an open system (not contained), what might happen to the measurable mass of the products when compared to the reactants?

• the measurable mass might decrease because any gas produced can escape (the actual mass would stay the same)

• the mass would increase because mass was created

• the measurable mass would stay the same because nothing would be able to leave the system.

• it depends on the type of reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

________ are the starting substances in a chemical equation.

• Reactants

• Producer

• Reaction

• Products

How many grams of OXYGEN would be needed to show conservation of mass in the example below?

• 100 g

• 93 g

• 7 g

• 0 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MgCl₂ represents a chemical

• Element

• Chemical Formula

• Subscript

• Coefficient

The substances listed on the right side of a chemical equation are the

• Coefficients

• Reactants

• Products

• Precipitates

How many atoms of Carbon are in the following formula?

3C₂H₆

• 3

• 6

• 9

• 18

Tags

NGSS.MS-PS1-1