A particular sample of air contains 2.694 mol N2, 0.725 mol O2, and 0.032 mol Ar. What is the mole fraction of each gas in this sample?​

Aaspirin has a density of 1.40 g/cm^3 what is the volume in cubic centimeters of a tablet weighing 320 mg?

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?