= 79.89; c. 92.26; d. 37.23. = 74.91; b. Calculate the mass percent composition of carbon in each the following carbon compounds - Science Mathematics Analysis of a sample shows that it contains 24.3% carbon and 4.1% hydrogen. (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. C2H6 4. Carbon would not have a way to enter the . Answer to Calculate the mass percent composition if carbon in each the following carbon compounds. a. C2H2 b. C3H6 c. C2H6 d. C2H6O Molecular weight calculation: 12.0107*3 + 1.00794*8 + 15.9994 ›› Percent composition by element a. Molar mass of C3H8O = 60.09502 g/mol. This compound is also known as Isopropyl Alcohol. molar mass = ( 3 x 12.011) + ( 8 x 1.008) = 36.033 + 8.064 = 44.097 g/mol % C = 36.033 x 100 / 44.097 = 81.7 % H = 18.3 Dichloroethane, a compound that is often used for dry cleaning, contains carbon, hydrogen, and chlorine. Calculate the mass percent composition of carbon in each compound. (Atomic mass: C = 12, H = 1, O = 16) Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. C3H4 C2H4 C4H10 C2H6O I need them in four significant figures-Divide atomic weight of carbon by molecular weight of the compound and multiply it by 100. What is its molecular formula? #C_2H_6# c. #C_2H_2# d. #C_2H_5Cl# Chemistry The Mole Concept Percent Composition. the mass of an element divided by the total mass of the compound and multiplied by 100% 7.37 calculate the mass percent composition of each of the following: a. #CH_4# b. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). 4.68 g of Si and 5.32 of O Answer . C3H6 3. Mass percent composition is also known percent by weight. (a) C2H2(b) C3H6(c) C2H6(d) C2H6O. C2H6O Click here to see a video of the solution Answer to Calculate the mass percent composition of carbon in each compound. It has a molar mass of 99 g/mol. How do you calculate the mass percent composition of carbon in each carbon-containing compound? 15g C3H6 (1 mol / 42.08 g) = .35 mol C3H6 C 2 H 4 Cl 2. It is abbreviated as w/w%. Weights of atoms and isotopes are from NIST article. Convert grams C3H8O to moles or moles C3H8O to grams. For a solution, mass percent equals the mass of an element in one mole of the compound divided by the molar mass of the compound, multiplied by 100%. chemistry. C2H2 2. Mass percent composition describes the relative quantities of elements in a chemical compound. 1 Answer Ernest Z. Oct 15, 2016 The percentages by mass are a. If 15.0 grams of C3H6, 10.0 grams of oxygen, and 5.00 grams of NH3 are reacted, what mass of acrylonitrile can be produced assuming 100% yield, what mass of the excess reactants remain? 1. C3H4: Mass % C = 36.033 x 100 / 40.0641 = 89. Calculate percentage composition of glucose (C6H12O6).