Practice Tests and Final

# Practice Tests and Final - Practice Test I Chapter 1,2,3 1...

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Practice Test I Chapter 1,2,3 1. Provide the name or formula for the following compounds. Methanol CO CaCO 3 Iron(III) hydroxide Copper (I) phosphate Zinc acetate 2. Report the following calculations with the correct number of significant figures. a. 12.36 * 1.6 b. 12.36 - 1.6 3. Jack measures the volume of an object four times and gets the following values, 12.59ml, 12.32ml, 12.94ml, and 13.62ml. What should he report as his average volume? 4. How many miles are in 26 Km? Note that 2.54cm = 1 in. 5. What volume would 15 lbs of honey occupy if the density of honey is 1.35g/ml? 6. What is 120F in C? In K? 7. If a rock is 85% granite and weighs 255 lbs, what is the weight of granite? 8. A sample of rock weighs 12.5g. When immersed in a graduated cylinder, the volume increases from 10.2ml to 11.5ml. What is the density of the rock? 9. What number of electrons, and protons are there in the following species? a. Na + b. O 2- c. Ne 10. A species has 26 protons and 23 electrons. What is it? 11. What is the weight percent of oxygen in Fe 2 O 3 ? 12. How many moles of NaCN are then in 25.3g of NaCN? 13. What is the weight of 0.23 moles of CH 4 ? 14. If a sample of Fe 2 O 3 has 12.3g of Fe, what weight of Oxygen does it contain?

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16. I have rock that contains limestone (CaCO 3 ) and granite. When heated, the limestone reacts as below. If the rock weighs 9.23g initially and the residue weighs 7.40g, what is the % limestone in the rock? CaCO 3 CaO + CO 2 17. I have a sample of Epsom salt (MgSO 4 .XH 2 O). When I heat up a 2.5265g sample, I end up with a 1.3262g residue. What is the formula for the Epsom salt? 18. Which of the compounds below are ionic? a. HCl b. SO 3 c. CaCl 2 d. NH 4 Cl e. FeCO 3 19. The reaction below is conducted with 12.6g of Fe and 16.2g of oxygen. What is the theoretical yield of Fe 2 O 3 ? If the actual yield is 17.5g, what was the % yield? Be sure to balance the reaction! Fe + O 2 Fe 2 O 3 20. In the above reaction, what weight of the excess reagent remains when the limiting reagent is used up? 21. What is the molarity of a solution made by dissolving 4.9g of H 2 SO 4 in 150ml of total solution? 22. What volume of a 0.12M HCl solution would have 7.2g of HCl? 23. How many grams of NaOH are there in 75ml of 0.36M NaOH? 24. I dilute 100ml of 0.59M NaOH to a total volume of 500ml. What is the concentration of NaOH in the final solution? 25. What is [NaOH] of a mixture of 50ml of 0.12M NaOH and 150ml of 0.25M NaOH? 26. Consider the reaction below. What weight of Mg(OH) 2 could I make if I reacted 100ml of 0.25M NaOH with excess MgCl 2 ? Note that the reaction must be balanced before you can work the problem. NaOH
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## This note was uploaded on 01/16/2009 for the course CHEM 1411 taught by Professor Moses during the Fall '08 term at A.T. Still University.

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Practice Tests and Final - Practice Test I Chapter 1,2,3 1...

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