General Chemistry Answers

62. Methylbenzene (toluene), CHI;CH;(1), is a common

paint thinner. It can be prepared from benzene, Cattal

CH,CI(g) + CoHo(1) > CH;CH;() + HCK(g)

In an investigation, 25.0 g of benzene is combined

with 20.0 g of chloromethane, CH, C1, in the presence

of an appropriate catalyst. (7.4, 7.5)

(a) Calculate the theoretical yield of toluene.

(b) If 22.0 g of CH, CH, is actually obtained, what is the

percentage yield?

(c)

Suggest reasons for the discrepancy between the

actual yield and the theoretical yield.

Suppose that 181.1 J of heat energy is required to completely vaporize 3.9 g of a pure liquid. If the molar mass of the liquid is 128.34 g/mol, what is the molar enthalpy of vaporization of the liquid?

An actual yield of 18g, the theoretical yield is unknown. Calculate the theoretical yield?

During a combustion reaction of H and O, H2O was produced. What is the limiting reactant in the reaction? And why?

72cm³ of a mixture of Nitrogen and Nitrogen oxide were passed over heated copper until all the nitrogen oxide had been reduced to nitrogen. The volume of the resulting gas was 60cm³, calculate the volume of nitrogen oxide in the original mixture.

130cm³ of air were passed through heated carbon. The resulting gas consisted a Carbon monoxide and nitrogen and the volume of Carbon monoxide was 54cm³. Calculate the volume of Nitrogen.

what happens to the bond angle when you add or remove an electron domain (electron pair)?

True or false

1. It is more common for a solid to have a higher density than a liquid.

2. The dispersion forces decreases with increasing atomic size.

3. Lower molecular forces allows freer movement.

Which of the following aqueous solutions will produce a blue precipitate with aqueous sodium hydroxide?

magnesium carbonate, MgCO3/ forms a hydrate containing 39.1% water of hydration. Calculate the formula of this hydrate containing 39.1 % water of hydration. Calculate the formula of this hydrate