_________ are the substances that are produced in a chemical reaction.

• Reactants

• Producer

• Reaction

• Product

Tags

NGSS.MS-LS1-7

________ are the starting substances in a chemical equation.

• Reactants

• Producer

• Reaction

• Products

Tags

NGSS.MS-PS1-5

The law of conservation of mass states that ________

• the total mass of reactants is more than the total mass of products

• the mass of a chemical reaction is not constant

• the mass of a chemical reaction remains constant

• the total mass of reactants is less than the total mass of products

Tags

NGSS.MS-PS1-2

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-PS1-5

Copper (Cu) and sulfur (S) were heated in a covered container. After the reaction was complete, the unreacted sulfur was removed. The table contains the results of the investigation. How much sulfur in grams failed to react with the copper?

• 1.32 g

• 4.54 g

• 5.02 g

• 10.88 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which chemical equation supports the law of conservation of mass?

• Equation (a)

• Equation (b)

• Equation (c)

• Equation (d)

Tags

NGSS.MS-PS1-5

Solve for the unknown mass: 6.1 g + ? g = 9.1 g

• 15.2

• 3 g

• 15.2 g

• 3

How many of each substance are present after the coefficient has been added in 3Pb(SO₄)₂

• 3 Pb and 3 SO₄

• 3 Pb and 6 SO₄

• 6 Pb and 24 SO₄

• 6 Pb and 6 SO₄

Tags

NGSS.MS-PS1-1

According to the law of conservation of mass, how much zinc was present in the zinc carbonate?

• 256 g

• 88 g

• 104 g

• 40 g

Tags

NGSS.MS-PS1-5

Which of the following equations is balanced?

• Equation (a)

• Equation (b)

• Equation (c)

• Equation (d)

Tags

NGSS.MS-PS1-5