Butanedione, a component of butter and body odor, has a cheesy smell. Elemental analysis of butanedione gave the mass percent composition: C, 55.80%; H, 7.03%; O, 37.17%. The molar mass of butanedione is 86.09 g/mol. Determine the molecular formula of butanedione.

The answer to your question is       C₄H₆O₂

Explanation:

Data

C = 55.80%

H = 7.03 %

O = 37.17 %

Molar mass = 86.09 g/mol

Molecular formula = ?

Process

1.- Express the percents as grams

C = 55.80g

H = 7.03g

O = 37.17g

2.- Convert the grams to moles

Carbon

                                  12 g of C 1 mol

                                  55.80 g   x

                                  x = (55.80 x 1)/12

                                  x = 4.65 moles

Hydrogen

                                  1 g of H  1 mol

                                  7.03 g      x

                                 x = 7.03 moles

Oxygen

                                  16 g of O 1 mol

                                   37.17 g    x

                                   x = 2.32 moles

3.- Divide by the lowest number of moles

Carbon          4.65/2.32 = 2

Hydrogen      7.03/2.32 = 3

Oxygen          2.32/2.32 = 1

4.- Write the empirical formula

                          C₂H₃O

5.- Calculate the molar mass of the empirical formula

    C₂H₃O  = (12 x 2) + (3 x 1) + (16 x 1) = 24 + 3 + 16 = 43 g

6.- Divide the molar mass of butanedione by the molar mass of the empirical formula

                           86.09/43 = 2

7.- Multiply the empirical formula by two

                          C₄H₆O₂

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.