Physical Chemistry Answers

(5a) Suppose you obtained an experimental (actual) yield of 1.81g of Aspirin and the theretically expected yield was 2.14 g. What is the % yield of Aspirin?

(5b) If your aspirin above was contaminated with 16.1% of salicylic acid, what is the correct experimental yield?

(5c) What is the correct % yield?

Find the numerical value of K of the reaction N_2_(g) + 3H_2_(g) = 2NH_3_(g). The values of [NH_3_] = 0.0318, [N_2_] = .30 and [H_2_] = .90.

A barrel holds 750 pounds of gasoline. The same barrel holds 1100 pounds of water when full. What is the density of gasoline? [Hint : when volume is constant, d ~ m]

8.60x10^-4=4.23x10^5/1.72x10^-4

how does solid,liquid and gas respond to changes in pressure?

Copper is sometimes coated on the bottom surface of cooking pans. Copper has a specific heat of 0.385 . A 25.5 sample of copper heated to 85.8 is dropped into water at an initial temperature of 14.5. If the final temperature reached by the copper-water mixture is 36.1, how many grams of water are present?

A 126 piece of metal is heated to 285 and dropped into 83.0 of water at 26. If the final temperature of the water and metal is 58.3, what is the specific heat of the metal ?

What is the mass of 7.9 × 10
15
atoms of nickel
(Ni)?
Answer in units of g

why are iron compounds more readily oxidised by air in an alkaline medium than in an acidic medium