The energy of formation of Schottky defects in a crystal of CaO is given as 6.1 eV. Calculate the number of Schottky defects present in CaO at 1000C and 2000C. How many vacancies are present at these temperatures

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d