Empirical and Molecular Formula Practice

Which of the following is considered an empirical formula?

• CH₃COOH

• C₆H₁₂O₆

• H₂O

• Mg₂Cl₄

Which pair of molecules would have the same empirical formula?

• NaCrO₄ and Na₂Cr₂O₇

• C₂H₄O₂ and C₆H₁₂O₆

• C₃H₆O₃ and C₂H₆O₂

• CH₄ and C₂H₆

Tags

NGSS.MS-PS1-1

What is the empirical formula of C₄H₆ ?

• CH

• CH₃

• C₂H₃

• C₄H₆

Tags

NGSS.MS-PS1-1

Which of the following is defined as a structural formula for C₄H₆?

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Which of the following is defined as a ball and stick model for C₄H₆?

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Which of the following is defined as a molecular formula for C₄H₆?

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Basic aluminium diacetate – Its molecular formula is HOAl(CH₃CO₂)₂ How many total atoms are in this molecule?

• 4

• 12

• 17

• 20

Tags

NGSS.MS-PS1-1

Basic aluminium diacetate – Its molecular formula is HOAl(CH₃CO₂)₂ How many total Aluminum atoms are in this molecule?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Basic aluminium diacetate – Its molecular formula is HOAl(CH₃CO₂)₂ How many total Carbon atoms are in this molecule?

• 2

• 4

• 6

• 8

4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?

• 41.97 amu
• 42.19 amu
• 10.43 amu
• 40.04 amu

Tags

NGSS.MS-PS1-1