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[DOC File]Chapter 13 worksheet #1
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Mass of water = mass of solution – mass of NaOH = 1000 g – (0.300 mol)(40 g/mol) = 1000 g – 12 g = 988 g. Molality = 0.300 mol/0.988 kg = 0.304 m. Notice that the molality is a little bigger than molarity. Why are these two numbers similar and why is molality always greater than molarity?
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[DOC File]Mole Conversion Worksheet
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400 g. 1 Step 4: The second fraction, the label we are trying to get rid of must go on the bottom; this will tell us how to align our conversion factor: 1 mole. 197 g. Step 5: Now our labels will cancel; this will give us an easy-to-solve multiplication problem. 400g 1 moles 400 x 1 moles. 1 197 g 197 2.03 mol Au. Mole-Particle Conversions. 1.
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[DOC File]AP Chemistry
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Multiple Choice (No calculator) 1. What mass of KBr (MM = 119 g mol-1) is required to make 500. mL of a 0.200 M KBr solution? (A) 0.595 g (B) 1.19 g (C) 2.50 g (D) 11.9 g. 2. The standard enthalpy of formation, Hof, of HI(g) is +26 kJ mol-1. What is the approximate mass of HI(g) that is decompose into H2(g) and I2(s) to release 500 kJ of energy?
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[DOC File]Molar Mass worksheet
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1.32 moles Si 7.29 mol CO2 712.4 g AuCl Molar Mass worksheet KEY. Determine the molar mass for the following elements: Ca Xe K. 40.08 g Ca 131.29 g Xe 39.10 g K. Fe Au O. 55.85 g Fe 196.97 g Au 16.00 g O. Determine the molar mass for the following molecules/compounds. NaCl H2O O2.
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[DOC File]Empirical and Molecular Formula Worksheet
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10) A well-known reagent in analytical chemistry, dimethylglyoxime, has the empirical formula C2H4NO. If its molar mass is 116.1 g/mol, what is the molecular formula of the compound? 11) Nitrogen and oxygen form an extensive series of oxides with the general formula NxOy. One of them is a blue solid that comes apart, reversibly, in the gas phase.
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[DOC File]Converting mass of a DNA band into moles:
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330 (g/mol)/b. 330 g / ( mol ( b ) Double-stranded: 660 grams per mole per base pair. 660 (g/mol)/bp. 660 g / ( mol ( bp ) Example problem: Find the number of moles which compose a 1.5kb band whose mass was determined to be 120 ng (by gel comparison to standards).
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[DOC File]UNIT 3 – WORKSHEET 1: MOLE PROBLEMS
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Find the molecular formula of a compound if its empirical formula is CH2O and its molar mass is 90 g/mol. CH2O = 12 + (2 x 1) + 16 = 30 g/mol. 90/30 = 3, so empirical formula x 3 + molecular formula =m so MF = C3H6O3 _____ Title: UNIT 3 – WORKSHEET 1: MOLE PROBLEMS Author: Fairfax County Public Schools Last modified by ...
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[DOC File]Mole Calculation Worksheet
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Use your Periodic Table, calculator, and Avogadro’s number (6.02x1023) to help. Check your notes for help with molar mass! (Here’s how to find the answers. To find mass in grams To find # of particles # of moles x molar mass # of moles x 6.02x1023. 1 mole x 1.00 g/mol = 1.00 g 1 mole x 6.02x1023 atoms/mol = 6.02x1023 atoms
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[DOC File]Moles of Chalk Lab - Science Curriculum
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Because the molar mass of calcium carbonate is 100. g/mol, the number of moles of calcium carbonate will be equal to the mass of chalk used to write their names divided by 100. For example, if it took 0.500 grams of chalk to write their name, the number of moles of calcium carbonate used would be 0.500 g / 100. g/mol = 0.00500 mol.
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[DOC File]Mole Conversions Worksheet
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2 Fe = 2 x 55.6 g = 111.2 g. 3 O = 3 x 16.0 g = 48.0 g. 159.2 g/mol. 5 moles Fe2O3 = 800 grams Fe2O3. Find the number of moles of argon in 452 g of argon. Find the grams in 1.26 x 10-4 mol of HC2H3O2. Find the mass in 2.6 mol of lithium bromide. Mole-Volume Conversions. 1. Determine the volume, in liters, occupied by 0.030 moles of a gas at STP ...
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G to mol calculator