8.5 D

Jamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be the approximate weight of the glass of water?

• 6 

• 12 

• 18 ounces

What do we call the chemicals that result from a chemical reaction?

• reactants

• products

• subscripts

• coefficients

Tags

NGSS.MS-PS1-5

________ are the starting substances in a chemical equation.

• Reactants

• Producer

• Reaction

• Products

Measure of the amount of matter 

• mass

• volume

• weight

• density

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-PS1-5

What number and types of atoms occur in a formula unit of Ca(NO3​)2​?

• carbon atom, neon atom, and 6 oxygen atoms

• calcium atom, 2 neon atoms, and 3 oxygen atoms

• carbon atom, nitrogen atom, and 3 oxygen atoms

• calcium atom, 2 nitrogen atoms, and 6 oxygen atoms

Tags

NGSS.MS-PS1-1

Which is an indication that a chemical change is taking place?

• Iron changes color when heated.

• Gas bubbles form in boiling water

• Solid wax forms when melted wax falls in ice water

• A gas forms when vinegar and baking soda are mixed

Tags

NGSS.MS-PS1-2

How many atoms of carbon are included in one formula unit of the compound Na₂C₂O₄?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

How much water (H2O) should be formed in this chemical reaction?

• 5g

• 9g

• 27g

• 31g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

This is used to represent the number of each atom being represented. 

• Exponent

• The Coefficient

• A Molecule

• The Subscript

Tags

NGSS.MS-PS1-1