Empirical Molecular Formula Percent Composition

the percent by mass of each element in a compound

• molar mass

• Avogadro's number

• representative particle

• percent composition

a chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of a compound

• conversion factor

• Avogadro's number

• empirical formula

• molecular formula

Do the diagrams have the same empirical formula?

• Yes

• No

Tags

NGSS.MS-PS1-1

Do the diagrams have the same empirical formula?

• Yes

• No

Tags

NGSS.MS-PS1-1

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

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

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

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

• always

• sometimes

• never

• one and

Which of the following is considered an empirical formula?

• CH₃COOH

• C₆H₁₂O₆

• H₂O

Tags

NGSS.MS-PS1-1

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

• C3H8

• CH4

• C2H2

• C4H10