Chemistry Exam Review #1

How many protons and electrons are in a ⁶⁴Cu²⁺ ion?

• 27 protons, 29 electrons

• 27 protons, 31 electrons

• 29 protons, 27 electrons

• 29 protons, 31 electrons

Tags

NGSS.HS-PS1-7

What is the name of the compound with the chemical formula CrCl₃?

• chromium tetrachloride

• chromium trichloride

• chromium(II) chloride

• chromium(III) chloride

If two oxygen atoms combine to make a molecule, what type of bond will they form?

• an ionic bond

• a hydrogen bond

• a double covalent bond

• a metallic bond

Tags

NGSS.HS-PS1-1

The half-life of phosphorous-32 is 14.3 days. How much of a sample of phosphorus-32 will remain after 57.2 days?

• 1/32

• 1/16

• 1/8

• 1/4

Tags

NGSS.HS-PS1-8

How does an S^2- ion differ from an electrically neutral sulfur atom?

• mass number

• atomic number

• nuclear charge

• number of electrons

A gas under a pressure of 74 mmHg and at a temperature of 75°C occupies a 500.0-L container. How many moles of gas are in the container?

• 1.7 moles

• 7.9 moles

• 13 moles

• 59 moles

Tags

NGSS.HS-PS3-1

Which one of these compounds is soluble in water?

• aluminum sulfide

• calcium carbonate

• iron(III) hydroxide

• potassium sulfate

In which block does an element with the electron configuration [Xe]6s²4f¹⁴5d¹⁰6p¹ belong?

• s block

• p block

• d block

• f block

Tags

NGSS.HS-PS1-1

What is the volume of 2.00 moles of nitrogen gas (N₂) at STP?

• 11.2 L

• 28.0 L

• 44.8 L

• 56.0 L

According to this balanced chemical equation, what volume of C₂H₂ is required to form 40.0 L of CO₂?

2C₂H₂ (g) + 5O₂ (g) → 2H₂O (g) + 4CO₂ (g)

• 20.0 L

• 44.8 L

• 80.0 L

• 100 L