Reactions, Solutions, Acids/Bases Exam

What are the reactants of the following chemical equation:

2NO + O2 → 2NO₂

• O2

• NO₂ and O2

• 2NO and O2
• NO and NO2

What are the product(s) of the following chemical equation:

H2CO3 → H2O + CO2

• Carbon monoxide and oxygen
• Water and carbon dioxide
• Methane and nitrogen
• Hydrogen and oxygen

What does the Law of Conservation of Mass state?

• Mass can change form in a chemical reaction
• Mass can be created in a chemical reaction
• Mass cannot be created or destroyed in a chemical reaction
• Mass can be destroyed in a chemical reaction

If Coach Nelson performs a reaction with 5 grams of Sodium Chloride and 10 grams of Silver (II) Nitrate, then what would be the theoretical yield of the product according to LOCOM?

• 5.00 g
• 15.00 g
• 2.00 g

• 7.00 g

Use the canvas to balance the chemical equation below:

__ Ch₄ +__ O₂ --> CO₂ + __ H₂O

If you have 5 grams of Sulfur, then how many moles do you have of Sulfur in that sample?

• 0.0156 moles

• 0.156 moles

• 0.015 moles

• 0.16 moles

If I have 3.5 moles of Potassium, then how many atoms of Potassium would there be in the sample?

• 3.5 x 10^24 atoms
• 1.5 x 10^24 atoms
• 5.0 x 10^24 atoms
• 2.108 x 10^24 atoms

If I have 18 grams of Beryllium, then how many atoms would be in this sample? (Hint: convert to moles first and then convert the moles to atoms)

• 1.2026 x 10^25 atoms

• 1.2026x 10^23 atoms

• 1.2046 x 10^24 atoms

• 1.2046 x 10^22 atoms

What kind of reaction is the following chemical equation:

• Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)

• Decomposition reaction

• Single displacement reaction
• Combustion reaction
• Double displacement reaction

What kind of reaction is the following chemical equation:

• CaCO3(s)→CaO(s)+CO2(g)

• Synthesis reaction
• Combustion reaction
• Double Replacement reaction

• Decomposition reaction