Empirical Molecular Formula Percent Composition

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. What is the empirical formula of this compound?

• C₃H₃Cl

• CH₆Cl₃

• CH₃Cl₃ 

• CHCl₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. If a compound which shares the same empirical formula as chloroform is known to have a molar mass of 223.53g/mol, what is the compound’s mole ratio with chloroform?

• 2

• 3

• 4

• 5

Do the diagrams have the same empirical formula?

• Yes

• No

Tags

NGSS.HS-PS1-7

Do the diagrams have the same empirical formula?

• Yes

• No

Tags

NGSS.HS-PS1-7

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. What is its molar mass in g/mol?

• 124.42

• 121.39

• 119.37 

• 74.51

Do the diagrams have the same molecular formula?

• Yes

• No

Tags

NGSS.MS-PS1-1

The molecular and empirical formula of a compound are __________ the same.

• always

• sometimes

• never

• one and

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

• C3H8

• CH4

• C2H2

• C4H10

Which of the following is considered an empirical formula?

• CH₃COOH

• C₆H₁₂O₆

• H₂O

Tags

NGSS.MS-PS1-1

An empirical formula:

• is a formula that calculates the coefficients of a compound in a balanced equation.

• is the simplest whole-number ratio of moles of elements in the compound.