Question

what is the number of molecules in1.5 mole of oxygen
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Answer 1

Answer:

⏩☺This number, which can only be found by practical measurement, is called Avagadro's constant/number, often denoted by N(A). It is about 6 x 10^23. So in 5 moles of oxygen gas, which has a mass of 5x16=80 grams, there are 5x6x10^23 = 30x10^23 molecules.☺⏪