11) The volume of a gas with a pressure of 1.2 atm increases from 1 L to 4L. wha

Question

11) The volume of a gas with a pressure of 1.2 atm increases from 1 L to 4L. what is the final pressure of the gas... 15. How Many liters of oxygen gas form when 294 g of KClO3 completely react in the follwing reaction. 2KClO3----> 2KCl+ 3O2 23) We dissolve 2.45 g of sugar into 200 g water what is the mass percent of sugar in the solution 29) How many grams of LiF would be present in 766 mL of .750 M LiF solution? and 27) A 90 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 3 L. The molarity of the final solution is: Thanks these problems seem relatively easy and not time consuming

Explanation / Answer

11) P2= V1xP1/V2 = 1.2 x 1/4 = 0.3atm ; 15) n= 294/122.5 = 2.4 since two moles of KClO3 reacts to give 3 moles of O2 n for O2 is 7.2 V= nRT/P = 7.2 x 8.314 x 298 / 1 = 1.783 x E4 ; 29) MOLARITY= n/V => m/M= molarity x V => M= MOLARITY x V x M= 14.93 ; 27) Molarity = n/V = 90/ 3x39 =0.769

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