What is are percent by mass of carbon in (C_2 H_6 SO)? a. 15.49 % b. 20.0 % c. 3

Question

What is are percent by mass of carbon in (C_2 H_6 SO)? a. 15.49 % b. 20.0 % c. 30.7% d. 44.3% For questions 6, 7 and 8 consider the following reaction: 4NH_3(g) + 70O_2(g) rightarrow 4NO_2(g) + 6H_2 O(g) This reaction is an example of a _ reaction? a. Decomposition reaction b. Double displacement reaction c. Synthesis reaction d. Combustion reaction If the reaction runs to 100% completion and 28.8 g of ammonia are complete combusted, how many grams of oxygen are consumed? a. 94.8 b. 54.1 c. 50.4 d. 30.9 e. 16.5 If 4.50 grams of ammonia react with 8.80 grams of oxygen what is the max in of nitrogen dioxide that can be made? a. 12.2 gNO_2 b. 7.23 gNO_2 c. 5.03 gNO_2 d. 4.50 gNO_2 The elements of Group 5A, the nitrogen family, form compounds with have the boiling points listed below. SbH_3 - 17 degree C. AsH_3 -55 degree C, PH_3 -87 degree C, NH_3 -33 degree C The first three elements illustrate a trend where the boiling point decrease; decreases; however, ammonia (NH_3) does not follow the trend because of a. dipole-dipole attraction. b. hydrogen bonding.

Explanation / Answer

Ans 5. c . 30.7 %

The molar mass of C2H6SO is 78.13 g/mol

Mass of carbon in the compound is 2 x 12.008 = 24.02

So the percent mass of carbon = (24.02 / 78.13) x 100 = 30.75 %

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