Chemistry Final Review A

Which of the following represent(s) a chemical Change?

1) Rusting of an iron bridge.

2) melting of ice.

3) burning of a wooden stick.

4) boiling of water.

5) dissolving of sugar in water.

• 1 and 3

• 2 and 5

• 1 to 4

• 1,3 and 4

• 2,3 and 5

Which of the following properties of a metal are chemical properties?

1) It is hard.

2) it rusts in air.

3) Its density id 5.5 g/cm³

4) It reacts with a base

5) It is a good electrical conductor

• 3 only

• 1 and 2

• 2 and 4

• 1 and 3

• all of the above

Assuming the numbers given are measurements, carry out the indicated arithmetic operation and give the answer with the correct number of significant figures.

2.36 x 10² + 5.4 x 10³

• 7.76 x 10²

• 7.76 x 10³

• 5.6 x10³

• 5.636x10³

• 5.64x10³

Oxygen boils at -297.3 F (Fahrenheit). What is this temperature in Kelvin?

• -195.8 K

• -47.2 K

• 0 K

• 90.2 K

• 160.2 K

How many protons, neutrons, and electrons are in the ¹⁴C atom?

• 6 protons, 8 neutrons, 6 electrons.

• 8 protons, 6 neutrons, 8 electrons

• 6 protons, 8 neutrons, 8 electrons.

• 14 protons, 14 neutrons, 14 electrons

• 6 protons, 14 neutrons, 6 electrons.

Give the name of the following compound: N₂O₃

• nitrogen oxide

• dinitrogen oxide

• dinitrogen trioxide

• nitrogen trioxide

  
  

• nitrogen oxygen

An element has two naturally occurring isotopes with following masses and natural abundances:

Isotope Mass ( amu ) Abundances (%)

W 68.9257 60.12

X 70.9249 39.88

What is the identity of the element above?

• T1

• Zn

• Ni

• Ga

• Cu

The correct formula for iron (II) chloride is:

• FeC1

• FeC1₂

• FeC1₃

• Fe₂C1

• Fe₂C1₂

Alkaline earth metal cations carry a charge of what?

• 2+

• 1+

• 0

• 1-

• 2-

What is the net ionic equation for the reaction between aqueous sodium hydroxide (NaOH) and aqueous nitric acid (HNO₃)?

• H⁺(aq) + NO₃ (aq) + Na⁺ (aq) + OH (aq) → H₂O(l) +Na⁺(aq) + NO₃ (aq)

• H⁺(aq) + OH ^- (aq) → H₂O(l)

• HNO₃ (aq) + NaOH (aq) → NaNO₃(aq)

• Na⁺(aq) + NO₃ (aq)→NaNO₃(aq)

• HNO₃(aq)+OH (aq)→H₂O(l) + NO₃ (aq)