Organic Chemistry Answers

A sample of a substance containing only C and H burns in excess O2 to yield 4.4g of CO2 and 2.7g of H2O. What is the empirical formular of the compound?

c8h18 reaction with cr203

Calculate the total hardness of a sample of water containing following impurities 16.2 

mg/L of Ca(HCO3)2, 11.1 mg/L of CaCl2, 60 mg/L of CaSO4 and Mg(HCO3)2, 11.2 mg/L 

of MgCl2, 60 mg/L of MgSO4 and 19 mg/L of Mg(NO3)2.

4. What is the pH of a 0.350 M solution of lithium citrate? (Ka Citric Acid = 7.4 x 10-4

The N in a 0.4984-g sample of organic material is converted to NH₄HSO₄ by digestion with concentrated H₂SO₄. If the NH₄⁺ ions are precipitated as (NH₄)₂PtCl₆ and the precipitate is ignited to Pt, what is the percentage of N in the sample if the Pt weighs 0.1876 g?

To determine the total hardness of given water sample n/20 solution

The percentage of nitrogen in a fertilizer designated as 6 12 8 is

A 'breath test' used by traffic police to check drunken driving uses?

A. Tumeric on filter paper

B. Silica gel coated with saliva nitrate

C. Potassium permanganate-sulphuric acid

D. Potassium dichromatic-sulphuric acid

Please explain why the answer is D and not C

Write the enantiomer of the following compound:

COOH

H OH

CH3

Assign R/S configuration to both the compounds.

Draw the cis- and trans- forms of 1, 3-dimethylcyclobutane.

(i) will be polar in nature?

ii) has higher melting point?

Explain your answer giving reasons.