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2320381 231.0369 238.0289 237.0482 (244)(243) (247) 18) Determine the volume of 02 (at STP) formed when 500 g of KCIO3 decomposes following reaction. The molar mass for KCIO3 is 122.55 g/mol. according to the 2 KCIO3(s) → 2 KCl(s) + 302(g) A) 12.3 B) 9.14 L C) 14.6LD) 8.22L. E) 13.7 L 认 19) A gas mixture consists of N2, 02, and Ne, where the mole fraction of N2 is 0.55 and the mo fraction of Ne is 0.25. If the mixture is at STP in a 5.0 L container, how many molecules of present? A) 2.7 1022 molecules 02 B) 4.5 x 1022 molecules O2 C) 3.7 x 1023 molecules O2 D) 9.3 x 1024 molecules O2 E) 1.1 x 1023 molecules O2 What pressure will 14.0 g of CO exert in a 3.5 L container at 75 C? A) 5.0 atm B) 4.1 atm C) 6.4 atm D) 2.3 atm
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mago-.kclo3-50g 50 moles cr kclo3 0.408 aa.55 ストcl 0.3 →Qkd, t 302, is 3 moles ot oz 1 moesot STP, P01 30o p 2 良 0.5 moles k.mol 3.5 L

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