Exam 1 Study Guide
Exam 1 Study Guide CHEM-1070-40
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This 4 page Study Guide was uploaded by Dkrefft on Wednesday September 16, 2015. The Study Guide belongs to CHEM-1070-40 at Tulane University taught by Lopreore, Courtney in Fall 2015. Since its upload, it has received 130 views. For similar materials see General Chemistry I in Chemistry at Tulane University.
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Date Created: 09/16/15
11 12 13 14 15 16 17 Vertical columns on the periodic table are called Chemistry 1070 Exam 1 921 Study Guide Give the number of significant figures for the following a 1000 b 323 c 64 x 10quot5 d 60 x 10quot5 Make each value have three significant figures a 5623 b 259700 c 1 Tell whether each one is a chemical or physical reaction a Water freezing b Rusting c Color change List the diatomic elements Tell if each substance is a heterogeneous or homogeneous mixture a Orange juice b A handful of change c A scoop of cookies and cream ice cream d A scoop of vanilla ice cream Convert 563 K to Celsius A 712 g sample of magnesium is heated with 180g of Bromine All of the bromine is used up and 207g of MgBr2 is the only product What mass of Mg is left unreacted When 0455g of Mg reacts with 2315g 02 0755g of MgO is obtained Determine the mass of Mg contained in 0500g Mg0 Find the ratio 1000g of carbon is combined with 2667g of oxygen Horizontal rows on the periodic table are called What s the mass of 235x1024 atoms of Cu How many atoms are in a piece of gold with density of 1932gcm3 25cm diameter 25cm width 0100mm high Consider CZHBrClFB Molar mass197382 gmol There are two moles of 0 one mole of H one mole of Br one mole of Cl and three moles of F What is the mass percent composition Determining empirical and molecular formulas from experimentally determined percent composition 4477 C 755 H 4771 0 Combustion of a 1152g sample of isobutyl propionate yields 2726g 002 1116g H20 What is the empirical formula Give the oxidation states for a P4 b A203 c m04 Write the forms for a Tin ll fluoride b Water 18 19 20 21 22 23 Write the names a HCI aq b HF aq c CoClZ x 6H20 d 502 Write a balanced equation to represent the reaction of mercury ll sulfide and calcium oxide to produce calcium sulfide calcium sulfate and mercury metal How many moles of 02 are produced from the decomposition from 176 mol of KCI How many grams MgN2 are produced from 382Mg A particular vinegar contains 40 CHBCOOH by mass lt reactions with sodium carbonate to produce sodium acetate carbon dioxide and water How many grams of C02 are produced by the reaction of 500 mL of this vinegar with an excess of sodium carbonate Density of vinegar 101gmL What is the percent yield of the reaction of 250 g P4 and 91 5g of Cl2 producing 104g PICB 104g is the actual yield 5103079005 10 11 12 13 14 15 Chem 1070 Exam 1 Study Guide Answer Key A 1 B 3 C 2 D 1 A 5620 B 259e3 C 100 A physical B chemical C physical BrlNClHOF A homogeneous B heterogeneous 563 27315 289 85 C 180 712 207 x 892207 685g 0455g Mg c heterogeneous dhomogeneous ng 07559 M00 0500 MgO x 0393019 Mg 12 CO2 groups periods 63546g x 6022x1023 235x1024 X39248g 0100mmx 1m 100 m 00100 x 1000mm 1m 1932g 250cm250cm0010cm 1208 A cm3 9 u 1 208 A 1 m0l Au 0 006133 A l 39 g M 1969679 39 um 23 613E103mol Au x m 369131021 atoms Au yc 2mole12011gmol x 100 12 17W C 0 197382gC2HBrClF3 39 0 051 H 4048 Br 1796 CI 2888 F 1molC 1molH 4477 g C x 3727 mol 752g H x 746 mol H 120119 c 1008g 4771 0 1mOl0 2982 l0 39 g x 159999 39 m0 C3727H74602982 2353 11273386202333 999 125H250 C4x125H4x25004x1 C5H1004 2726x 1molC quot0 120119 07449 C 0620 mol 0 44g C02 1 mol C02 1 mol 1116g H20x quot0 2mm 08quot 01259 H 01249 mol H 18011g 1mol H20 1mol 11529074419012499 0283g o 16 17 18 19 20 21 22 23 0283 0 1mom 00177 l 39 g x15999g39 m0 00620 01239 00177 C00177 H00177 000177 C35H70 9 9 9 C7H1402 a 0 b 2Al 32 0 so Al 3 c 4x2 Mn 1 so Mn 7 SnF2 dihydrogen oxide H20 Hydrochloric acid hydrofluoric acid cobalt ll hexahydrate sulfur dioxide 4HgS 4Ca a BCaS CaSO4 4Hg 176 mol KCl03 x 3m 02 264 mol 02 l 2molKC1013 1m0 M 1m0 M 3N2 10093 3829 Mg x g g may 529 g 2431gMg 3molMg ZCH3COOH NaZCOB 9 2NaCOOCH3 002 H20 101 g 4g CH3COOH 1 mol CH3COOH 1 mol C02 44g 5 m x 1 mL x 100g vinegarx 60059 x 2 mol CH3COOH xmol 740e 2 g c02 P4 3 6Cl2 g a 4PCI3 L 250 P4 Ml 02018 l 39 g x 124g 39 m0 915 Cl2 1m0l 129044 l g x7olgog m0 639576 P4 is the limiting reactant molP4 0202 0202 4 4m0lPCl3 13733g 39 m x 1mol P4 x 1m0l 104g produced x 100 937 yield mol C12 129 111 g PC l3 theoretically 111 g theoretical
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