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How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

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

What does the symbol (–hfus) indicate in a phase change?