>>(i) Enumerate the action of soap as an emulsifying agent and as a cleansing agent
(ii) Explain the differences in the structures of soap and soapless detergent,
give two merit and demerit each.
(i) With the aid of detailed diagram, outline the lock and key hypothesis
that explains enzyme -- controlled reactions.
(ii) Discuss the condensation reaction between two Amino acids to form a
dipeptide with the aid of detailed structural equation of reaction.
What are the components that make up a sucrose? Write out the
structure of the main condensation product.

How are elements arranged in a periodic table

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon