Chemistry Final Exam

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactant

• Product

• Yields

• Chemical Reaction

The reaction below is a Bronsted-Lowry acid-base reaction.

HSO₄−−(aq) + NH₃(g) → NH₄+ (aq) + SO₄⁻²(aq)

Which statement best describes the action of NH3(g) in the reaction?

• It acts as a base because it is a proton donor.

• It acts as a base because it is a proton acceptor.

• It acts as an acid because it is a proton donor.

• It acts as an acid because it is a proton acceptor.

Which of the following solutions is the most acidic?

• [OH] = 1 x 10⁻¹³ M

• [OH] = 1 x 10⁻⁴M

• [H₃O^+] = 1 x 10⁻¹¹ M

• [H₃O] = 1 x 10⁻² M

Which substance can be classified as an Arrhenius acid?

• KOH

• LiH

• HF

• KF

What is the molarity of a solution containing 20 grams of NaOH in 0.50 liter of solution?

• 0.50 M

• 2.0 M

• 1.0 M

• 10 M

A compound contains 40% calcium, 12% carbon, and 48% oxygen by mass. What is the empirical formula of this compound?

• CaCO₃

• CaC₃O₆

• CaC₂O₄

• CaCO₂

How many moles of tungsten atoms are in 4.8 x10²⁵ atoms of tungsten?

• 1.3 x 10⁻²moles

• 8.0 x 10²moles

• 8.17 x 10^-17moles

• 1.3 x 10⁻¹ moles

Chemistry is the study of......

• Bio-chemicals

• matter and its interaction with the envioronment

• Explosions

• None of the above

The numbers in front of the reactants and the products after we balance the chemical equation is called

• Subscript

• Coefficient

• Molecules

• None of the above

The molecular formula is the 

• dividend of the Empirical formula

• addition of the Empirical formula

• multiple of the Empirical formula.

• none of the above.