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Explain why a lake on bed of limestone is naturally buffered against the effects of acid rain.

The name of the Natural Product is Kava (Pioer Methysticum)

  1. The UPAC and the common names of the natural product.
  2. The structure of the natural product, including stereochemistry and numbering
  3. The genus and species name of the organism (plant/animal/microorganism) from which it was isolated and the name of the family to which this organism belongs.
  4. The reason the organism was investigated, and the significance of this reason.
  5. Why this natural product was worth reporting, i.e., why is it significant?
  6. Any biological activity, either originally or subsequently reported
  7. The classification of the natural product, i.e., to which family of natural products does it belong
  8. The possible or probable biogenetic pathway (show the biogenetic units in the structure if possible
  9. Any other organisms which have been found to contain this natural product
  10. The names and structures of other natural products isolated from the organism, and their relationship to the natural product, if any

If 150 mL of a sorbitol solution weigh 170 g, what is its specific gravity?

If a liter of a cough syrup weighs 1285 g, what is its specific gravity?

If 500 mL of ferric chloride solution weighs 650 g, what is its specific gravity?

If 380 g of cottonseed oil measures 415 mL, what is its specific gravity?

If 2 fl. oz. of glycerol weighs 74.1 g, what is its specific gravity?

Five pints of diluted hydrochloric acid weighs 2.79 kg. Calculate its specific gravity.

A pycnometer weighs 21.62 g. Filled with water, it weighs 46.71 g; filled with another liquid, it weighs 43.28 g. Calculate the specific gravity of the liquid.

A glass plummet weighs 14.35 g in air, 11.40 g when immersed in water, and 8.95 g when immersed in sulfuric acid. Calculate the specific gravity of the acid.

What is the weight, in kilograms, of 5 liters of sulfuric acid with a specific gravity of 1.84?

What is the volume, in milliliters, of 1 lb of benzyl benzoate having a specific gravity of 1.120?


How to prepare 800 ml of 2 M NaCl solution?



0.58g of flavoring substance is used to improve the taste of the pineapple cake. What is the number of molecules of the flavoring substance? [RMM flavoring substance = 116 gmol-1]


Ch3-o-c2h3 name the compound

0.58g of flavoring substance is used to improve the taste of the pineapple cake. What is the number of molecules of the flavoring substance? [RMM flavoring substance = 116 gmol-1]


Write the chemical equation for the thermite reaction between aluminium and iron(iii) oxide

Which of the following statements is(are) true for all voltaic (or galvanic) cells?

(I) Reduction occurs at the cathode.

(II) The anode gains mass during discharge (note: this means operation of the cell.)

 III) The voltage is less than or equal to zero. 



In the reaction below the oxidising agent is


Na + Cl2 ------> 2NaCl