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[DOCX File]GCSE Science Chemistry (9-1) Development of the Periodic …
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They make molecules made of pairs of atoms (these are called diatomic molecules) As you go down the group, the relative molecular mass, melting point and boiling point increase. But the reactivity of the elements decreases going down the group. A more reactive halogen can displace a less reactive halogen from its compounds.
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[DOC File]Week 2, Lab 1: 9/15: Atoms
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average mass of a marble = 1(5.00g) + 3(7.00g) = 6.50 g/marble. 4 marbles. Or the average mass of a marble can be determined by (1) multiplying the fraction of marbles of a particular type by the mass of a marble of that type and (2) taking a sum over all types of marbles: average mass of a marble = (0.250 x 5.00g) + (0.750 x 7.00g) = 6.50 g
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[DOC File]Section 1: Pressure conversions
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Find the mass in grams of 1 liter of CH4 at STP. The mass of 1 liter of a gas at STP is 2.75 g. Calculate the molecular mass. The density of hydrogen is 9.00 x 10-2 g/L. What will be the mass of 100 liters? What volume will 1.5 x 1023 molecules of oxygen occupy at STP? Measured at STP, 33.6 liters of NO gas represents how many moles?
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[DOC File]CHEMISTRY WORKSHEET # 2 MOLE PROBLEMS—THE MOLE …
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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 grams or molecules. ... (If you are having difficulty go back and review mole worksheets 1 …
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Houston Community College
3. The sugar glucose contains C, H, and O and has a mass of 180.0634 amu as determined by high-resolution mass spectrometry. Glucose contains an equal number of carbon and oxygen atoms. What is the molecular formula of glucose? (1H = 1.00783 amu, 12C = 12.00000 amu, 16O = 15.99491 amu)
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Worksheet – Mole Conversions
Conversions between mass and particles (MUST go through the mole!!!!) How many molecules are in 38.5 g of carbon dioxide? How many oxygen atoms are in 81.2 g of calcium hydroxide? What is the mass of 3.56 x 1025 formula units of copper (II) sulfate? What is the number of molecules present in 50.00 g of diphosphorus pentoxide?
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[DOC File]Thoughts for Activity sheet for Lesson 31:
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If lighter molecules can go farther up into the atmosphere than heavier molecules, how would you expect m to vary with altitude? As you go higher in the atmosphere, what should happen to m? The mean mass should become smaller as you go higher. What effect do you think this should have on the y vs. ln( ) graph? Predict how the graph will change ...
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[DOC File]CHAPTER 1
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Given the mass and volume of a substance, calculate the density (Example 1.4). 5. Using the density to relate mass and volume. Given the mass and density of a substance, calculate the volume, or given the volume and density, calculate the mass (Example 1.5). Exercise 1.6. A piece of metal wire has a volume of 20.2 cm3 and a mass of 159 g.
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[DOCX File]Moles
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molar mass. of an element or compound is used to convert the mass of a sample into the number of atoms or molecules in that sample. In this lab, you will perform molar conversions for small samples of three everyday substances, water, chalk, and aluminum.
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[DOCX File]Guidelines on Preschool/Kindergarten Learning Experiences ...
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This document, the Guidelines for Preschool and Kindergarten Learning Experiences, (GPKLE), provides guidance for planning, aligning and implementing curriculum that addresses the Pre-K and Kindergarten learning standards outlined in the Curriculum Frameworks of the Massachusetts Department of Elementary and Secondary Education (DESE).
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How to go from molecules to mass