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Rank the following compounds in order from least phosphorus atoms to most phosphorus atoms in

Rank the following compounds in order from least phosphorus atoms to most phosphorus atoms in

Rank the following compounds in order from least phosphorus atoms to most phosphorus atoms in a 50.0 g sample:  P4, P4O10, PH3, PCl3

A)PCl4O10 4D)P4O10 4

B)PCl4O10 3E)P4O10 3

C)P4O10 3

 

72.              Rank the following compounds in order from least chlorine atoms to most chlorine atoms in a 50.0 g sample:  Cl2, ClF3, Cl2O, PCl3

A)ClF23D)ClF2O

B)PCl23E)Cl23

C)ClF22

 

73.              What is the mass of 3.5 ? 1023 molecules of CO2?

A)  1.7 g    B)  26 g    C)  0.58 g    D)  75 g    E)  1.5 ? 1025 g

 

74.              What is the mass of 4.5 ? 1023 molecules of SO2?

A)  2.9 ? 1025 g    B)  64 g    C)  86 g    D)  36 g    E)  48 g

 

75.              What is the mass of 2.4 ? 1023 molecules of NO2?

A)  75 g    B)  18 g    C)  1.2 ? 102 g    D)  1.1 ? 1023 g    E)  12 g

 

76.              What is the mass of 7.4 ? 1024 molecules of SO3?

A)  12 g    B)  590 g    C)  980 g    D)  6.5 g    E)  0.15 g

 

77.              What is the mass of 1.2 ? 1024 molecules of F2?

A)  0.052 g    B)  9.5 g    C)  19 g    D)  38 g    E)  76 g

 

78.              Which of the following statements regarding empirical formulas, molecular formulas, and percent composition is correct?

A)The empirical formula and molecular formula of a given compound are always the same.

B)Two compounds having different percent compositions of the same two elements are not the same compound.

C)The empirical formula and molecular formula of a given compound are never the same.

D)Data on the percent composition of the elements in a given compound is insufficient to determine the empirical formula of the compound.

E)The compound S2Cl2 would have the same empirical and molecular formulas.

 

79.              Which of the following statements regarding empirical formulas, molecular formulas, and percent composition is correct?

A)The compounds NOand N2O4 have the same empirical formula.

B)The compounds NOand N2O4 have the same molecular formula.

C)The empirical formula of H2O2 is H2O.

D)The empirical formula of N2O5 is NO2.5.

E)The compounds PCl3 and PCl5 would have the same percent composition.

 

80.              Which of the following statements regarding empirical formulas, molecular formulas, and percent composition is correct?

A)A compound with the molecular formula P4O10 would have the empirical formula P4O10.

B)It is not possible to determine the empirical formula of a compound if given only its percent composition.

C)If the molecular formula of a compound is C6H5Cl, its empirical formula is the same.

D)Empirical formulas contain more information than molecular formulas.

E)Formulas for ionic compounds are normally given as molecular formulas.

abhinav behal 15-Feb-2020

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