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Inorganic Chemistry
How many hours typically do you work per week? ... the equation for the percent yield, answer the following questions. Show all of your work, and don’t forget those sig figs! 1. When 84.8 g of iron (III) oxide ... Determine the percent yield for the reaction between 98.7 g Sb 2 S 3 and excess O 2 if 72.4 g Sb 4 O 6 is recovered along with an ...
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[DOC File]Chapter 1
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How many significant figures in each? 203,000,000 0.03590 127.0 300 300. Rounding. If the number to the right of the number you are rounding to is 5 or more, you round up, otherwise you do not. 12.5431875 => 12.54 with 4 sig. figs. 3.14159 => 3.14 with 3 sig. figs. 453.6 => 454 with 3 sig. figs
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[DOC File]CH 7 HOMEWORK
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A sample of brass contains by mass 28.0% zinc and 72.0% copper. How many kilograms of brass could be produced from 6.00 kilograms of copper? ... What are the empirical and molecular formulas of a compound if 212.1g of the compound contains 42.4g of hydrogen and 169.7g of carbon. The formula mass of the compound is 30.0 g/mol. ... Watch sig figs ...
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[DOC File]Boyles Law Problems
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1. A gas occupies 12.3 liters at a pressure of 40.0 mm Hg. What is the volume when the pressure is increased to 60.0 mm Hg? 2. If a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm?
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[DOC File]200 Ways to Pass the Chemistry
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How many joules are required to boil 120 g H2O (l)? 71. Always use Kelvins for temperature when using the combined gas law. P1V1 = P2V2. T1 T2. Set up the equation to calculate the volume of 50. mL of methane gas collected at STP . when the pressure rises to 2.4 atm and the temperature drops to 240 K. 72.
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[DOC File]NEWTON’S LAWS
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35. The signs in the two diagrams below hang at equilibrium by means of two cables which are arranged symmetrically. The mass of the sign and the angle between the cables is indicated. Use trigonometric functions and force principles to determine the tension in the cables. Compute to two sig figs. a. m = 5.0 kg. b. m = 8.0 kg
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[DOCX File]Science with Mr. Louie - Home
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In chemistry, we often use numbers that are either very large (1 mole = 602 200 000 000 000 000 000 000 atoms) or very small (the mass of an electron = 0.000 000 000 000 000 000 000 000 000 000 910 939 kg). Writing numbers with so many digits would be tedious and difficult.
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How many sig figs for 169 72