Semester 1 Review Packet

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Chemistry Final Review Sheet - 1st Semester Objectives96. 550,000 mm to km97. What type of electrons are involved in a bond? ________________________________98. How many formula units are in 73.0 g of Ca(NO 3 ) 2 ?Essay Questions105. Explain the evidence that allowed Rutherford to determine the internal structure of the atom. Discussboth the nucleus and the electron cloud.Name the following compounds107. Li 2 S ____________________________________________________________________________________________108. Ca(BrO 2 ) 2 ____________________________________________________________________________________________109. PbO 2 ____________________________________________________________________________________________110. FeN ____________________________________________________________________________________________111. NaNO 3 ____________________________________________________________________________________________112. (NH 4 ) 2 SO 4 ____________________________________________________________________________________________113. Cu(ClO 4 ) 2 ____________________________________________________________________________________________114. MgCO 4 ____________________________________________________________________________________________Stoichiometry1. How many moles of O 2 should be supplied to burn 1 mol of C 3 H 8 (propane) molecules in a campingstove?2. How many moles of O 2 molecules should be supplied to burn 1 mol of CH 4 molecules in a domesticfurnace?3. Sodium thiosulfate (Na 2 S 2 O 3 ), photographer’s “hypo” reacts with unexposed silver bromide in thefilm emulsion to form sodium bromide and a compound of formula Na 5 [Ag(S 2 O 3 ) 3]. How manymoles of Na 2 S 2 O 3 formula units are needed to make 0.10 mol of AgBr soluble?4. Calculate the mass of alumina (Al 2 O 3 ) produced when 100 g of aluminum burns in oxygen.
Chemistry Final Review Sheet - 1st Semester Objectives5. “Slaked lime,” Ca(OH) 2, is formed from “quick-lime” (CaO) by adding water. What mass of wateris needed to convert 10 kg of quicklime to slaked lime? What mass of slaked lime is produced?6. Camels store the fat tristearin (C 57 H 110 O 6 ) in the hump. As well as being a source of energy, the fatis a source of water, because when it is used the reaction2 C 57 H 110 O 6 (s) + 163 O 2 (g) 114 CO 2 (g) + 110 H 2 O(l)takes place. What mass of water is available from 1.0 kg of fat?7. The compound diborane (B 2 H 6 ) was at one time considered for use as a rocket fuel. How manygrams of liquid oxygen would a rocket have to carry to burn 10 kg of diborane completely? (Theproducts of the combustion are B 2 O 3 and H 2 O.)8. Given the balanced chemical equationBr 2 + 2 NaI 2 NaBr + I 2How many moles of sodium bromide (NaBr) could be produced from 0.172 mol ofbromine (Br 2 )?9. How many formula units of calcium oxide (Cano) can be produced from 4.9 x 10 5 molecules ofoxygen gas (O 2 ) that react with calcium (Ca) according to this balanced chemical equation?2 Ca(s) + O 2 (g) 2 CaO(s)10. Aluminum metal (Al) reacts with sulfur (S) to produce aluminum sulfide (Al 2 S 3 ) according to thisbalanced chemical equation:2 Al(s) + 3 S(s) Al 2 S 3 (s)How many atoms of aluminum will react completely with 1.33 x 10 24 atoms of sulfur?11. What is the maximum mass of methane (CH 4 ) that can be burned if only 1.0 g of oxygen isavailable?12. What is the maximum mass of glucose (C 6 H 12 O 6 ) that can be burned in 10 g of oxygen?13. The solid fuel in the booster stage of the space shuttle is a mixture of ammonium perchlorate andaluminum powder, which react as follows:6 NH 4 ClO 4 (s) + 10 Al(s) 5 Al 2 O 3 (s) + 3 N 2 (g) + 6 HCl(g) + 9 H 2 O(g)What mass of aluminum should be mixed with 5.0 x 10 3 kg of ammonium perchlorate, if the reactionproceeds as stated?14. A solution containing 5.0 g of silver nitrate was mixed with another containing 5.0 g of potassiumchloride. Which was the limiting reagent for the precipitation of silver chloride?
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