If 50.0 g of silicon dioxide is heated with an excess of carbon, 27.9 g of silicon carbide is produced. What is the percent yield of the reaction

The percent yield of the reaction is 83.5 %

Explanation:

The given balanced equation is

is the limiting reagent as it limits the formation of product and is the excess reagent.

According to stoichiometry :

60.08 g of produce = 40.11 of

Thus 50.0 of will produce=  of

 Experimental yield of SiC = 27.9 g

Percent yield =

Thus  percent yield of the reaction is 83.5 %

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.