Unit 8 & 9 Honors Chemistry Quiz

Name this formula:

KNO₃

• Potassium Nitrogen Oxide

• Potassium Nitride

• Potassium Nitrate

• Potassium (I) Nitrite

what is the name of CCl₄?

• carbon tetrachloride

• monocarbon tetrachloride

• tetracarbon monochloride

• carbon chloride

What is the percent by mass of oxygen in MgO?

• 20%
• 40%
• 50%
• 60%

Which pair has the same empirical formula?

• NaCrO₄ and Na₂Cr₂O₇
• C₂H₄O₂ and C₆H₁₂O₆
• C₃H₆O₃ and C₂H₆O₂
• CH₄ and C₂H₆

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

• CH₂O
• C₂H₄O₂
• C₄H₈O₄
• C₆H₁₂O₆

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

•  NaPO2
• Na2PO3
• Na3PO4
• NaPO4

How many mL of stock solution of 2M NaCl do you need to prepare 100 mL of 0.150M NaCl?

• 7.5 mL

• 15 mL

• 1333 mL

• 200 mL

I am titrating 1.0 M HCl with 0.5 M NaOH. I have 25 cm³ of HCl. How much NaOH will I need?

• 2.5 cm³

• 5 cm³

• 25 cm³

• 50 cm³

Which of the following is the strongest acid if the pH is provided as follows?

• 1

• 5

• 3

• 8

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base