Chemistry Final Study Review

Avery, Michael, and Nora were conducting a science experiment in their school lab. They mixed two chemicals together and observed some changes. Explain the evidence that would indicate a chemical change has occurred.

• Color change

• Phase change

• Bubbles

• Precipitate

Tags

NGSS.MS-PS1-2

Nora is helping Mason in a science experiment. They need to convert 75 L of a solution to milliliters. Can you help them?

• 100 ml

• 0.075 ml

• 0.75 ml

• 750 ml

Given the parent isotope, 238- Uranium and another element that yields 252- Einsteinium and two neutrons, what is the other element?

• Mg

• He

• F

• Au

Tags

NGSS.HS-PS1-8

If the half-life of a substance is 3 years, how much of the original substance would be left in 6 years?

• 1/3

• 1/4

• 1/8

• 1/6

Classify the following elements based on their positions on the periodic table. Period 3, Group 2:

• Hydrogen

• Beryllium

• Boron

• Magnesium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Classify the following elements based on their positions on the periodic table.

Period 5, Group 14:

• Aluminium

• Tellurium

• Tin

• Bromine

Tags

NGSS.HS-PS1-1

Explain why intra-molecular forces such as ionic bonding are stronger than intermolecular forces.

• The bonds make it stronger

• The force is strong

• it is stronger in covalent bonds.

• Inside the molecule is stronger than different molecules.

Use the chemical formula to answer the question below. Balance the following chemical equation. KClO3 (s) KCl(s) + O2 (g)

• 2,2,3

• 2,2,2

• 4,2,3

• 8,8,12

Tags

NGSS.HS-PS1-7

Hydrogen gas is collected over water at 24°C. The partial pressure of water is 2.64kPa and hydrogen gas has a partial pressure of 94.7 kPa. Find the total pressure of the mixture of hydrogen gas and water.

• 175 mmhg

• 97.34 kPa

• 44.7 amu

• 74.3 atm

Four moles of magnesium metal reacts with HCl to produce hydrogen gas and magnesium chloride at a pressure of 223 kPa and a temperature of 27oC. What is the volume of the produced gas?

• 44.7 L

• 97.34 L

• 175 L

• 27 L