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WA. Homework 2

# WA. Homework 2 - Detenuine the number of protons neutIons...

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Unformatted text preview: Detenuine the number of protons, neutIons and elections in each of the following. (a) 1502- (b) 31p} (c) 27AI3+ rotons rotorLs rotons I cl i neutrons neutrons neutrons I“ I“ I“ electrons electrons electrons I“ I“ I“ (d) 235” (E) 75AE5+ protons protons I“ I“ neutrons neuhom I“ I“ electrons electrons I“ I“ Balance the following equations using the smallest integer coefﬁcients. I¢Cr2{>.. + IVHzo a limomg I~IPCI5 + leHzo —> I’H3P04 + .w/HCI I¢Mgzc + I¢H2o A I‘lMQth + lwcw IVBFgr ’NaH —> '4 Nasa + IJBZH. list); + I’Ca3(PO4)2 —> IVons + I’CanOa What is the mass of potassium in a sample of IQPO4 that contains 8.39 g of oxygen? -“9K A sample of N203 contains 1.1 moles of nitIogen. Use the following atomic masses: N :14, 0:16. The number of moles of N203 present = -’ mol N203 The mass of the sample = -’ g N203 The number of moles of oxygen in the sample : -’ mol 0 The mass of oxygen in the sample : -V g D Balance the following equations using the smallest integer coefﬁcients: (a) P4+ H2—> PH: I’P4+ IVHZ—a. I’Prh (b) Clz + 02 4} clzo; Ila; + lie; —} I’Cl207 (c) Al + 55 —> AI253 I’Al + I’sg a IVAIZSZ (d) H3P04 + KoH —> K3PD4 + H20 I’H3P04 + I’KDH —> I’KEPD4 + I’Hzo (e) Al + H20 6 A|(OH)3 + H2 'Wu + I¢Hzo a IVAI(0H)3 + I’Hz (f) N205 + H20 a HNOs I’Nzos + I’Hzo 4: IvHNoa What is the mass of a 0.645 mole sample of Ge? Report your answer to two places past the decimal point. -"9 Consider the reaction of 60.0 g of iron as follows: 4Fe + so; —> 2Fezo3 How many moles of iron react? -’ mol How many moles of oxygen must react? -J mol How many moles of product form? -V mol What mass of product forms? -V g How many gram of phoshphoms are in a sample of Caa(PO4)z that contains 17.0 g of calcium? mass phoshphoms : -’ g Acetaminophen is CaHgNloz. What mass of Acetaminophen contains 0.370 moles of N? .“9 How many moles of Fe atoms are in 19.8 g of Fe? Report your answer to three places past the decimal point. - “moles ...
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