Chemistry 101 Notes Week 6
Chemistry 101 Notes Week 6 101
Popular in Chemistry
Popular in Chemistry
This 3 page Class Notes was uploaded by Satori Le on Sunday October 11, 2015. The Class Notes belongs to 101 at Washington State University taught by Michael Finnegan in Fall 2015. Since its upload, it has received 9 views. For similar materials see Chemistry in Chemistry at Washington State University.
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Date Created: 10/11/15
C12H22011s KCO3 IC02gH20gKC s O Balanced equation 1 C12H22011 8 KCO3 gt 12 C02 11 H20 8 KCI If the gummi bear contains 2796 g of sucrose what mass of KCO3 is required 8008 g Elemental silicon can be produced by reacting silicon tetrachloride with magnesium metal predict the other product Write and balance an equation for this process 0 O O SiCl4l2MgsDSis 2 MgC2 lfl had 5000 kg of SiCl4 and 5000g of Mg could I make 5000g of Si If no how much Si can I make lll anything be left over What and how much 5000 g SiCl4 1 mol SiCl4 16989 g 1 mol Si 1 mol SiCL4 2809 g 1 mol 8267114 g Si 5000 g Mg 1 mol Mg 2480 g 1 mol Si 1 mol Mg 2809 g 1 mol 28899177 gSi No you cannot make 5000 g of Si there is not enough Mg iron onle makes 2890 g of Si Limiting reactant limiting reagent It is possible to determine the limiting reactant if the masses of all the reactants are known 0 0 Choose a product of the reaction Calculate the mass of this product that can be made from each statement What mass of calcium atoms has the same number of atoms as 125 g of aluminum atoms 0 125 g Al 4008 g Ca 2698 g AI 186 g Ca How many grams of iron have the same number of atoms as 12011 g of carbon 0 5585 g Fe 0 12011 g C 5585 g Fe12011 g C What is the mass of one mole of magnesium o 243 g l look at element on periodic table atomic weight Another unit for the atomic weight is g mol What is the mass of 0003500 mole of carbon 0 0003500 mol C 12011 C 1 mol C 00420385 004204 g C What is the mass of one mole of carbon monoxide 0 CO o C 120 g mol o O 1600 g mol 0 1216 2801 gmol o On mole of CO has mass of 2801 g Molar mass 0 The mass of one mole of a compound is equal to the sum of the atomic weights of the component atoms What is the molar mass of iron Ill oxide 0 Formula Fe203 o 25585 gmol 31600 gmol 15970 gmol o Molar mass needs to be provided two digits after decimal point 0 When calculating molar masses use the rules for addition to determine the signi cant gures What is the mass of carbon monoxide is required to react with 5000 g of III oxide 0 Fe203s3COg 2Fe I 3 C02g There are three steos ti answering a stoichiometry question 0 Convert the mass you are given to moles 2 5585 3 1600 15970 50000 g 115970 13087 0 Find the moles of the other substance that will react with what you were given using the mole ratio from that balanced chemical equation 313087 3 1 939261 CO 0 Convert moles to mass 939261 28011 2631 Write the balanced equation for the decomposition of hydrogen peroxide 0 2 H202aq02g2H20 Element oxidized O 1 l 0 0 Reduced O 1 2 Which sample contains more atoms 1000 g of iron of 1000 g or carbon c There are more carbon atoms carbon atoms are smaller and have less man than Fe atoms So we need more c atoms to make up 100 g The atomic weights are the average mass of atom of that element given in atomic mass units amu 1 amu 166054103924g What mass or iron would have the same number of atoms as 1000 g of carbon 1000 g C 1 atom 1201 55851
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