1. Is N2 an element or a compound? 2. How many significant figures does the number 0.0100 have? 3. How many millliters are in a liter? 4. Write 0.000024 in scientific notation. Do not use "OWL shorthand” with an E. 5. How many significant figures are in the answer to 1.240 +0.1? 6. How many significant figures are in the answer to 0.22 - 10? 7. What is 55°C in °F? (estimates are okay) 8. What is the atomic symbol for tungsten? 9. Name the component of an atom that has the lowest mass. 10.Provide the atomic symbol for a chalcogen. 11.Name a weak electrolyte. 12.What is the phase label for acetic acid? 13.Identify a transition element with only one common ion. Provide the symbol and charge of this ion. 14. Give the atomic symbol for an alkaline earth metal that has an equal number of protons and neutrons in its nucleus. 15.Provide the formula for an element that is a liquid at room temperature. 16.What term is used to describe how carbon-12 and carbon-13 are related? 17.What is the name of the element in Group 4A and Period 6? 18.Provide the name for H3PO4. 19.Provide the formula for cyanide ion. 20. What is the full name of Fe2+? 3 points each (show your work for calculation problems) 21.Write the full atomic notation for the element with 17 protons and 18 neutrons. 22.Provide the common and formal names for NO. Write them in the order requested. 23. What is the formula for the ionic compound that would form between copper(II) ion and thiocyanate ion? 24.Name this compound: NH4NO2. 25.Name this compound: S2F10. 26.Provide the names of two pieces of glassware you compared accuracies of in Lab 1. 27.How many grams are in 2.0 mol SO2? 28.Provide the formula for sodium sulfate. 29. Is chromium(III) nitrate soluble or insoluble? 30.Provide the formula for nitrous acid. 31. How many moles are in 3.0 x 1023 molecules of Brz? 32.Show the balanced equation between Cr(s) + Ag+(aq) -> Cr3+(aq) + Ag(s) 33. Show the balanced equation for the combustion of pentane in oxygen. Answers will not be accepted or graded on this sheet 6 points each 34.Provide the balanced chemical equation, complete ionic equation, and net ionic equation for the reaction between strontium nitrate and sodium phosphate. 35.A 24.65 g sample of MgSO4 hydrate was heated to drive off its water, leaving 12.04 g anhydrous MgSO4. What is the formula of the hydrate? Show all work. Circle your final answer. 36.A compound is found to have a percent composition of 40.0% C, 6.67% H, and 53.3% O. What is its empirical formula? What information do you need to determine its actual molecular formula and how would you use this information? 37.Calculate the theoretical yield, in grams, of AICl3 when you start with 2.70 g Al and 4.05 g Cl2. Show your work completely, including all units, for full credit. Circle your answer. Significant figures are important in your final answer. 2 Al(s) + 3 Cl2(g) + 2 AlCl3(s)
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