Questions


September 2022 1 9 Report
An analysis of a certain compound gives the
following percent composition by mass;

C: 44.4%
S: 39.5%
H: 6.21%
0:9.86%

Given: molar mass of the compound 162 g
__45. Calculate the number of moles of sulfur.
a. 1.65 moles
c. 2.23 moles
b.3.12 moles
d. 1.23 moles
__46. Calculate the number of moles of carbon.
a. 3.7 moles
c. 4.5 moles
b.3.0 moles
d. 2.7 moles
__47. Calculate the number of moles of hydrogen.
a. 2.50 moles
c. 5.25 moles
b. 1.0 mole
d. 6.15 moles
__48. What is the empirical formula of the
compound?
a. CsH12S2O2
c. C6H10S120
b. C6H10920
d. C6H109204
__49. Calculate the molar mass of the empirical
formula of your answer on number 48.
a. 165.4 g
c. 145.4 g
b. 166 g
d. 162.2 g
__50. What is the molecular formula?
a. C5H12S2O2
c. CoH10S120
b. C6H10S20
d. C6H10S204​

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