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[DOC File]CHEMISTRY WORKSHEET # 2 MOLE PROBLEMS—THE MOLE …
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Measuring in chemistry is done using the mole. This lab is intended to determine the percent composition of sugar in bubble gum based on molar mass. Chew carefully and don’t swallow the compound. Lab Goals. Determine percent composition of a compound based on mass. Calculate the moles of sugar in bubble gum. Procedure
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[DOC File]Mass and Mole Relationships
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One mole of carbon-12 has a mass of 12.0g. One mole of hydrogen atoms has a mass of 1.0g. One mole of hydrogen molecules has a mass of 2.0g. One mole of sodium chloride has a mass of 58.5g. The number of particles in one mole of a substance is 6.02 x 1023. This is known as . Avogadro's number, L.
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[DOC File]Percent Composition
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the mole ratio is the ratio of the coefficients in a balanced chemical equation. In this experiment, you will be adding . sodium bicarbonate (baking soda) with . hydrochloric acid. to produce . sodium chloride, carbon dioxide, and . water. Purpose: To calculate the number of moles of reactant and product in a simple chemical equation.
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[DOC File]AP Chemistry study guide for Solutions (Chapter 11)
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chemistry worksheet # 6 mixed mole problems (grams, molecules, and liters) You now know three things a mole can be: a molar mass, 6.02 x 1023 molecules and, for a gas, 22.4 liters at STP. We can use this information to convert grams to molecules or liters, molecules to grams or liters, or liters to …
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[DOC File]Chemistry - Mole Notes
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Mole fraction (X) X = moles NaOH / total moles = moles NaOH / (moles NaOH + moles H2O) (2000 g water)/(18.0 g/mol) = 111.1 mol H2O. X = 20.0 moles / (20.0 moles + 111.1 moles) = 0.153 (no unit) Notice that the answer does not depend on the identity of the solute. The mole fraction of solute in any 10 m aqueous solution is 0.153! Mass % and ppm
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[DOC File]Chapter 13 worksheet #1
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Calculate the mole fraction of urea in the solution. Don’t forget that Raoult’s law (as written above) is in terms of the mole fraction of water! Pwater = XwaterPowater . Xurea = 1 – Xwater = 1 – 0.8201 = 0.1799. Ethanol and water form an ideal solution (they are miscible). Both of these substances are volatile so they both obey Raoult ...
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[DOC File]Mass & Mole Relationships in a Chemical Reaction
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A Calculation of the formula mass of a reactant or product enables us to convert from mole relationship given by the coefficients of the balanced equation then allows us to calculate how many moles of every other substance will take part in the reaction. In this experiment, we will investigate the quantitative relationships in the reaction: ...
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Mole Calculator
.111 mole x 6.02 * 1023 atoms/ 1 mole = .668 * 1022 atoms E. Grams to particles. Example - How many molecules are in 4.4 g. of water? H - 1.0 g. O - 16.0 g. so H2O = 18.0 g. 4.4 g. x 1mole/ 18.0 g.=.24 moles x 6.02 * 1023 molec./mole = 1.4 x 1023. F. Particles to moles. Example - How many moles are in 5.22 x 1023 molecules of silver bromide?
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[DOC File]Ch
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0.060 mole (B) 0.12 mole (C) 0.24 mole (D) 0.30 mole (E) 0.40 mole Free Response Question (1991) 2) The molecular formula of a hydrocarbon is to be determined by analyzing its combustion products and investigating its colligative properties.
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How to calculate a mole in chemistry