Formula units in chemistry
[DOC File]Chemistry Worksheet Stoichiometry
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26. 2.66 x 1022 formula units of potassium iodide. Determine the mass in grams of each of the following quantities. 27. 1.24 moles of beryllium. 28. 3.35 moles of calcium. 29. 0.155 mole of sulfur. Calculate the number of moles in each of the following samples. 30. 6.35 g lithium. 31. 346 g zinc. 32. 115 g nickel. 33. 3.75 g calcium carbide (CaC2)
[DOC File]Chemistry – 2nd Semester Review for Final Exam
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Calculate the empirical formula for compounds with the following compositions: Fe 63.5%; S 36.5%. Mn 63.1 %; S 36.9%. What is the molecular formula for each compound? Each compound’s empirical formula and molecular molar mass are given. CH2O, 90 g/mol C3H6O3. HgCl, 472.2 g/mol Hg2Cl2. C3H5O2, 146 g/mol C6H10O4
[DOCX File]Honors Chemistry - Unit 2
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atoms, ions, formula units or molecules. Examples of Conversion Factors: 1 mol 1 mol 6.02 X 1023 molecules6.02 X 1023 atoms, ions . or formula units . Molar Mass. Mass in g of 1 mole of anything. For an element, the molar mass is equal to the atomic weight from the periodic table. 1 mol atomic wt. (g)
Chemistry Laboratory
Chemistry Laboratory Page 4. Determination of Empirical Formula of a Compound. Prelab Questions: Show all equations, work, units, labels, and significance when calculating. Provide complete, detailed, yet concise responses. How can you tell when an excess of hydrochloric acid has been added to the evaporating dish with the magnesium?
[DOC File]CHEMISTRY WORKSHEET # 2 MOLE …
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You will be expected to have a functioning calculator with you for every chemistry class. The only new concept we will introduce in this unit is the idea of a mole. A mole is a quantity of matter that we use for conversion purposes. We can convert from grams to moles, liters to moles (for gases), and atoms, formula units, or molecules to moles.
[DOC File]Empirical and Molecular Formulas and Percentage Composition
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You may at first think about the fact that one molecule of chlorine reacts with two formula units of potassium iodide to produce two formula units of potassium chloride and one molecule of iodine. While this is true, it’s impossible to actually study this reaction at the atomic level in a chemistry laboratory; we cannot count out just one or ...
[DOC File]Chemical Bonding Activity - FREE Chemistry Materials ...
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Chemical Formula copper (II) ion Cu2+ cation 1 CuO oxide O2- anion 1 Use the pieces to make one molecule (technically, the term should be “formula unit,” since these are ionic compounds) of any five of the compounds and get your teacher’s initials.
[DOC File]Unit 1 Measurement, Matter and Change
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8. List and define SI units of measurement. Also, know the prefixes used in Chemistry (Giga through nano) 9. Convert one measurement of unit to another using the factor label method. 10. Calculate and compare the densities of solid s, liquids and gases. 11. Graph experimental data (mass, volume) to determine the density and identify a pure ...
Worksheet – Mole Conversions
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? What is the mass of 1.25 x 1023 sodium ions? Worksheet – Mole Conversions Name: Show all work utilizing dimensional analysis wherever possible. Include all units and account for significant ...
[DOC File]Mole-Particle Practice Worksheet - Honors Chemistry
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(Particle is the generic word that we use in chemistry for: molecule, formula unit, ion, atom, etc.) Hints: Always begin by writing out the formula for any compound in the problem. Remember to give your answer to the correct number of significant digits. Part One: One Step Conversion. 1. How many formula units are there in 2.45 moles potassium ...
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