SCH 3UI Final Exam Review

Cu₂S

• copper sulfide
• copper (I) sulfide
• copper (II) sulfide
• copper sulfate

A bond in which an atom shares a pair of electrons is __.

• an ionic bond
• a covalent bond
• a metallic bond 
• an isomer

Which gas is a product of the complete combustion of propane, C₃H₈?

• O₂
• CO₂
• CO
• CH₄

Which gas is most abundant in the atmosphere?

• argon
• oxygen
• hydrogen
• nitrogen

Which quantity is NOT equal to one atmosphere of pressure?

• 760 mmHg
• 101.3 Pa
•  1 atm
• 700 Torr

If you purchase a helium balloon and take it outside on a cold day, __.

• it increases in volume
• it decreases in volume
• the pressure in the balloon increases
• the mass of the balloon increases

How many neutrons are in an atom of the isotope As-72?

• 105
• 72
• 39
• 33

What volume would 3.0 moles of helium gas occupy at STP?

• 4.0 L
• 22.4 L
• 67.2 L
• 16.0 L

How many significant figures are in the measurement 811.40 grams?

• two
• three
• four
• five

All atoms are ____.

• positively charged, with the number of protons exceeding the number of electrons
• negatively charged, with the number of electrons exceeding the number of protons
• neutral, with the number of protons equaling the number of electrons
• neutral, with the number of protons equaling the number of electrons, which is equal to the number of neutrons