ACP Review Day 6

ACP Review Day 6

Multiple Choice

Given this molecular formula, Li₃O₅

What is the empirical formula?

• Li₃O₅

• LiO₂

• LiO

• Li₂O

Multiple Choice

Given this molecular formula, N₁₂H₁₄

What is the empirical formula?

• N₁₂H₁₄

• NH

• NH₂

• N₆H₇

Multiple Choice

Given this molecular formula, H₉O₂

What is the empirical formula?

• H₉O₂

• HO

• H₂O

• H₆O₁

Multiple Choice

Given this molecular formula, H₄O₂

What is the empirical formula?

• H₄O₂

• HO

• H₂O

• H₆O₄

Multiple Choice

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

• ionic formula
• covalent formula
• empirical formula
• molecular formula

Multiple Choice

A formula with the lowest whole # ratio of elements in a compound is called

• Molecular Formula
• Chemical Formula
• Empirical Formula 
• Distance Formula

Multiple Choice

How to calculate molar mass of H₂O?

• 2+16=18

• 1+16=17

• 2+32=34

• 1+31=32

Multiple Choice

What is the percent composition of carbon in CaCO₃ ?

• 11.9% C

• 47.9% C

• 40.9% C

• 40.04% C

Multiple Choice

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

Multiple Choice

What is the mass percentage of Carbon in Carbon dioxide (CO₂)?

• 27.27%

• 42.86%

• 72.73%

• 72.72%

Multiple Choice

What is the percent by mass of sodium in NaCl?

• 39%

• 61%

• 35%

• 65%

Multiple Choice

Which of the following is NOT needed to calculate percent composition?

• Mass of specific element
• Molar Mass
• Avogadro's Number
• Division