Molecular Formulas

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

How many Carbons "C" are in C₁₈H₃₄O₃

• 18

• 34

• 3

• 37

Tags

NGSS.MS-PS1-1

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

• CH₂O

• C₂H₄O₂

• C₄H₈O₄

• C₆H₁₂O₆

(8.5D 2019-Q17)

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

• 4 carbon atoms, 11 hydrogen atoms, and 1 oxygen atom

• 7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom

• 7 carbon atoms, 11 hydrogen atoms, and 8 oxygen atoms

• 6 carbon atoms, 14 hydrogen atoms, and 3 oxygen atoms

Tags

NGSS.MS-PS1-1

(8.5D 2017Q-13)

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

• A

• B

• C

• D

Tags

NGSS.HS-PS1-7

How many nitrogen atoms are there?

• 4

• 8

• 10

• 20

Tags

NGSS.MS-PS1-1

What is the molecular formula for a compound with the empirical formula: K₂SO₄ and a molecular mass of 696g.

• K₂SO₄ 

• K₈SO₁₆

• K₈S₄O₈ 

• K₈S₄O₁₆ 

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.

Tags

NGSS.MS-PS1-1