Chemistry Quiz exam 2

Write a balanced equation for the reaction of molecular nitrogen (N₂) and oxygen (O₂) to form dinitrogen pentoxide.

• The balanced equation has 5 N₂

• The balanced equation has 2 O₂

• The balanced equation has 5 N₂O₅

• The balanced equation has 5 N₂

• None of the above

Categorize the reaction Ca (s) + Br₂ (l) → CaBr₂ (s).

• Combination and Redox

• Combination only

• Redox only

• Decomposition and Redox

• None of the above

Balance the redox reaction in acid solution: Br₂ (l) + SO₂ (g) → Br⁻ (aq) + SO₄²⁻ (aq).

• The balanced equation has 2 H⁺

• The balanced equation has 1 Br⁻

• The balanced equation has 2 Br₂

• The balanced equation has 2 H₂O

• None of the above

In the reaction: 2 Na (s) + Cl₂ (g) → 2 NaCl (s)

• Sodium is the oxidizing agent

• Chlorine is the reducing agent

• Sodium is the oxidant

• Chlorine is the reductant

• None of the above

What is the charge on nitrogen in KNO₃?

• 1+

• 2-

• 3-

• 5+

• None of the above

What is the % Cl⁻ in a sample if 1.1324 g of the sample produces 1.0881 g of AgCl(s) when treated with excess Ag⁺ according to the balanced reaction: Ag⁺(aq) + Cl⁻(aq) → AgCl(s)?

• 76.24 %

• 0.2691 %

• 86.33 %

• 23.76 %

• None of the above

Tags

NGSS.HS-PS1-7

What volume of a 0.3300-M sodium hydroxide would be required to titrate 15.00 mL of 0.1500 M oxalic acid? The balanced chemical equation is: H₂C₂O₄(aq) + 2 NaOH(aq) → Na₂C₂O₄(aq) + 2 H₂O(l).

• 6.818 mL

• 0.0045 L

• 0.01364 L

• 33.00 mL

• None of the above

Tags

NGSS.HS-PS1-7

What is the product, if any, when aqueous solutions of KI and Pb(NO₃)₂ are mixed?

• PbI₂(aq)

• PbI₂(s)

• KNO₃(aq)

• No Reaction

• None of the above

Tags

NGSS.HS-PS1-1

What is the kinetic energy associated with the random motion of atoms and molecules?

• Thermal energy

• Temperature

• Work

• Heat

• None of the above

Tags

NGSS.HS-PS3-4

How much heat is absorbed when 217 g of metal with a specific heat 0.451 J/g°C has its temperature increased from 24.5°C to 39.1°C?

• 3830 J

• 1430 J

• 6.70 J

• -1430 J

• None of the above

Tags

NGSS.HS-PS3-4