Percent Composition, Empirical & Molecular Formulas

What is the percent mass titanium in TiCl₃?

• 31.0 %

• 3.22 %

• 45.0%

• 68.9 %

What is the percent mass chlorine in calcium chlorate, Ca(ClO₃)₂? (Those elements are calcium, chlorine, and oxygen)

• 34.3%

• 17.1%

• 20.7%

• 54.3%

What is the empirical and molecular formula for the compound shown above?

• C₆H₁₂O₂ empirical, CHO molecular

• C₆H₁₂O₂ empirical, C₆H₁₂O₂ molecular

• C₃H₆O empirical, C₆H₁₂O₂ molecular

• C₆H₁₂O₂ empirical, C₃H₆O molecular

Tags

NGSS.HS-LS1-6

If a compound has an empirical formula of P₂O₃ and a molar mass of 220. g/mol, what is its molecular formula?

• P₂O₃

• PO_1.5

• P₄O₆

• PO

Tags

NGSS.HS-PS1-7

If a compound is 49.1% manganese and 50.9 % fluorine by mass, what is its empirical formula?

• MnF₃

• MnF

• Mn₃F

• MnF₂

A compound is 7.99% lithium and 92.01% bromine by mass. What is its empirical formula?

• LiBr₁₂

• LiBr

• LiBr₂

• Li₂Br

A compound has a molecular formula of C₂H₆O₄, what is its empirical formula?

• C₂H₆O₄

• CH₃O

• CH₃O₂

• CHO

A compound is 63.5% iron and 36.5% sulfur. If it has an actual molar mass of 263.76 g/mol, what is its empirical and molecular formula?

• FeS empirical, Fe₃S₃ molecular

• FeS empirical, FeS molecular

• FeS empirical, FeS₃ molecular

• Fe₃S₃ empirical, FeS molecular