1-butanol yields 1-bromobutane in the presence of concentrated sulfuric acid and an excess of sodium bromide. ch3ch2ch2ch2oh (l) → ch3 ch2ch2ch2br (l) if 15.89 ml of 1-butanol produced 12.23 g of 1-bromobutane, the percentage yield of the product equals: (assume the density of 1-butanol is 0.81 g/ml, the molar mass of 1-butanol is 74 g/mol, and the molar mass of 1-bromobutane is 137 g/mol.)

51.34 %

Explanation:

You first need to calculate the theoretical yield of Bromobutane taking into account the amount of initial Butanol doing some stoichiometric calculations:

Then you calculate the yield giving the real amount you produced:

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explanation:

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.