Other Chemistry Answers

Q . Export fishes are believed to be containmented with Mercury give reason why?

Benzene is a liquid hydrocarbon. When a 342 mg sample of benzene is burned in an excess of
oxygen 1156 mg of carbon dioxide is produced. Determine the empirical formula of benzene. If
the molar mass of benzene is 78.1134 g/mol, what is the molecular formula of benzene?

(A) Safety regulations dictate that a ladder leaned against a building must be at an angle of 65°. A ladder that is 10.0 feet long will be used. How high up the side of building will the ladder safely reach? Include a diagram in your answer.

(B) A wind mill is 180 ft high. A guy wire will be fastened to the base of the windmill, 20 feet from the top and anchored into ground. The guy wire makes an angle of 40° with the ground. What length of the wire will be needed? Include a diagram in a diagram in your answer.

Why the structure of newly synthesized drug needs to be determined ? Give reason .

Why the structure of newly discovered virus needs to be determined? Give reason.

Why a new indicator is required for complexometric titration? Give reason

Why A newly discovered fresh water reservoir is believed to have arsenic level greater than WHO recommended safe values? Give reason

Propose a suitable sample strategy for following analytical problems ,give reason for your answer
A) To study contamination of fish in a river
B)To study the effect of automobile exhaust on air quality
C)To identify ground water contamination around chemical factory
D) To determine if vegetables are contaminated with sprayed pesticides

what type of analysis (quantitative, qualitative, fundamental, characterization or combination) is required to solve following problems and why?
a) Export Fishes are believed to be contaminated with mercury
b) A newly discovered fresh water reservoir is believed to have arsenic levels greater than WHO recommended safe values.
c) A new indicator is required for complexometric titration
d) The structure of a newly discovered virus needs to be determined.
e) The structure of a newly synthesized drug needs to be determined

Q.1 what type of analysis (quantitative, qualitative, fundamental, characterization or combination) is required to solve following problems and why?
a) Export Fishes are believed to be contaminated with mercury
b) A newly discovered fresh water reservoir is believed to have arsenic levels greater than WHO recommended safe values.
c) A new indicator is required for complexometric titration
d) The structure of a newly discovered virus needs to be determined.
e) The structure of a newly synthesized drug needs to be determined.