Question

A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: C 6 H 14 .

Answer 1

Part A:

A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: C 7 H 16 .

Enter the percentages of carbon and hydrogen numerically, separated by commas.

Part B:

A certain metal hydroxide,M(OH)2 , contains 32.8% oxygen by mass. What is the identity of the metal M ?

Enter the full name of the element.

Best answer 100% (6 ratings)

Part A Given Hydrocarbon is C7 H16. Mass % of element = (mass of element present in the compound / molar mass of given compound) x 100 Molar mass of C7 H16 = ( 7 x mass of carbon) + (16 x mass of Hydrogen) = (7x12) + (16 x1) = 100 Mass % of carb... view the full answer