Test 4 Review

In a chemical equation, “dissolved in water” is represented by which of the following symbols?

• (s)

• (l)

• (g)

• (aq)

How many atoms of oxygen are represented in 2Mg(SO₄)₂

• 2

• 4

• 8

• 16

Tags

NGSS.MS-PS1-1

A solid produced from two aqueous solutions in a chemical reaction is known as a(n)

• precipitate

• oxide

• salt

• hydrocarbon

Classify the following reaction: HCl(aq) + NaOH(aq) -> NaCl(aq) + H₂O(l)

• double replacement

• single replacement

• conbustion

• decomposition

To balance a chemical equation, it may be necessary to change the substances

• subscripts

• superscripts

• coefficients

• formulas

Which of the following statements best describes the following reaction?

MgCl₂ + I₂ -> MgI₂ + Cl₂

• It is a double replacement reaction.

• It is a decomposition reaction.

• It is a synthesis reaction.

• The reaction will not occur.

Which of the following would not be considered evidence of a chemical reaction?

• Formation of a precipitate

• Production of a gas

• State of matter change

• Sudden release of light

Tags

NGSS.MS-PS1-2

Which of the following statements best describes the following reaction?

Na₂S + 2Li -> Li₂S + 2Na

• It is a single replacement reaction.

• It is a decomposition reaction.

• It is a synthesis reaction

• The reaction will not occur.

Which of the following best represents the general equation for a synthesis reaction?

• AB -> A + B

• A + B -> AB

• AX + B -> BX + A

• AX + BY -> AY + BX

List the reactants in this reaction.

2H₂(g) + O₂(g) -> 2H₂O(l)​

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5