Chemistry Answers

A system absorbs 50J of heat during a transformation. Determine the change in internal ener the system perform, (a) 15J and (b) 65J of work on the surrounding.

1. What is the molecular mass of a non-electrolyte solute in a solution that contains 0.6kg of sol 200g of benzene with a freezing point equal to 5.4°C? The freezing point of pure benzene is 5.5 The freezing point constant of benzene is 5.12°C.

Sodium chloride is often used to prevent icy roads and to freeze ice cream. What are the boiling and freezing points of a 0.029m aqueous solution of sodium chloride? (i = 2)

Identify all possible products when the tripeptide Ala–Ala–Val undergoes complete hydrolysis

Identify all possible products when the tripeptide Ala–Ala–Val undergoes partial hydrolysis

Q1. 3 moles of an ideal gas run through a Camot cycle (A-B-C-D-A) to carry out some work. Data is shown below in the table. Determine the followings. (Given: 7-1.8) (i) Unknown parameters (?) at each state Net work done in Joule with correct sign, Carnot efficiency and actual efficiency State Pressure (Pa) 1300000 Temperature (K) Volume (m) 0.011 0.027 0.018 A B C D

Pipette 1 drop of aqueous solution of phenol into a test tube and add 3 drops of 2 N

NH4OH, then add 3 drops of saturated of bromine water. In a few seconds you will

observe blue color indicating to the formation of indophenol. Describe your

observation and write all reaction equations.

Consider two normalized eigen functions ψ1 and ψ2 , corresponding to the same eigen value. If

∫ψ∗1ψ2dτ=d ,

where d is real

Find a normalized linear combinations of ψ1 and ψ2 that are orthogonal to

(a) ψ1

(b) ψ1+ψ2

Note: The coefficients of the linear combinations need not be real

givin the reaction:

Mg (s) + 2HNO3(aq)

which tempurature will the reaction occur at the greatest rate?

Forty eight grams of carbon is added and reacted to 134grams of oxygen to produce Carbon dioxide. Find (a) the balance chemical equation (4points), (b) the mass of the product (4points), (c) the limiting reactant (4points), (d) the mass of excess reactant not used in the reaction (6points). Write the complete formula and solution for each problem.You can use a separate sheet if needed. Use whole numbers only.