Module 19 Reaction Review

Each substance to the right of the arrow in a chemical equation is a(n) ________.

• Catalyst

• Product

• Reactant

• Inhibitor

Tags

NGSS.MS-PS1-1

The numbers that go before symbols and formulas in a chemical equation are ________.

• Superscripts

• Subscripts

• Catalysts

• Coefficients

Substances that speed up chemical reactions are called ________.

• Inhibitors

• Products

• Reactants

• Catalysts

If energy must be added to a chemical reaction for the reaction to take place, the reaction is ___________.

• exergonic

• exothermic

• endergonic

• endothermic

Tags

NGSS.MS-PS3-4

A teacher wants to demonstrate a chemical reaction for her students. Which activity below would best demonstrate a chemical reaction?

• Placing metal in an acid to create gas

• Measuring the densities of water and ice

• Melting a solid piece of aluminum

• Filling a balloon with helium gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does (g) represent in a chemical equation?

• Gas

• Glucose

• Gel

• Ground state

Which of the following is a product in the reaction: 2H₂ + O₂ → 2H₂O?

• H₂

• O₂

• H₂O

• H

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which of the following observations does NOT indicate that a chemical reaction has occurred?

• formation of a precipitate

• production of a gas

• state of matter change

• heat and light released

Tags

NGSS.MS-PS1-2

All of the actions below will increase the rate of a reaction EXCEPT

• Stirring

• Putting the substance in a refrigerator

• Putting the substance in an oven

• Crushing the substance into tiny pieces

The symbol (s) written after a formula in a chemical equation stands for __________

• solid

• soluble

• solution

• synthesis