Emp/Molec formula exit ticket

How many Carbons "C" are in C₁₈H₃₄O₃

• 18

• 34

• 3

• 37

What is the best definition for subscript?
 

• The big number that tells you the number of molecules.

• The atomic number

• The little number that tells the number of atoms for each element.

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

• Mg₄N₃
• MgN₂
• Mg₃N₂ 
• MgN

Molecular Formula = C₂F₆

Choose the correct empirical formula.

• CF

• C₂F₆

• C₃F

• CF₃

Empirical Formula = CF₂

Molecular formula mass = 192 g/mol

Molecular Formula = ?

• C₄F₈

• C₈F₄

• C₃F₆

• C₂F₄

How would you calculate the molar mass for C₄H₆?

• 12.0111 + 1.00794

• 4(12.0111) + 6(1.00794)

• 2(12.0111) + 3(1.00794)

• 6(12.0111) + 4(1.00794)

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

What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?

• C3H8
• CH4
• C2H2
• C4H10

The empirical formula of a substance is CH₂O. The molar mass is 180g/mol. What is the molecular formula?

• CH₂O

• C₃H₆O₃

• C₆H₁₂O₆

• C₁₂H₆O₁₂