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CHEM 120 Week 3 Quiz (Jan 2021)

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CHEM 120 (CHEM120)
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1. Question: Magnesium metal can react with hydrochloric acid to produce magnesium chloride and hydrogen gas. Which of the following chemical is the complete and balanced representation of this process? 2. Question: Determine the molar mass of the molecule Boron Tri fluoride 3. Question: Does the image show atoms changing states? 4. Question: Balance the skeletal equation Li(s) +H2O(f)--LiOH(aq)+H2(g) 5. Question: How many atoms of O are in the molecule of the material Al(NO3)3 6. Question: For the reaction 3Cu(NO3)2 aq +2Na3PO4(aq)-CU3(PO4)2(s)+6NaNO3(aq) ,select ALL of the true statements 7. Question: Aluminum reacts with oxygen according to the following reaction 4Al(s) +302(g)-2Al2O3(s). If the 12 moles of aluminum react completely with oxygen, how many moles of Al2O3 should form? 8. Question: Whatisthe%concentrationofasolutionconsistingof60gramsof solute dissolved in solution with a total volume of500ml? 9. Question: You want to prepare a 1.2 M FeCl3 solution. You only have 6mlof a 3.6 M FeCl3 on hand .How many ml of 1.2M FeCl3 solution can you prepare ? Show all work

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1. Question: Magnesium metal can react with hydrochloric acid to produce magnesium chloride and
hydrogen gas. Which of the following chemical is the complete and balanced representation of this
process?
2. Question: Determine the molar mass of the molecule Boron Tri fluoride
3. Question: Does the image show atoms changing states?
4. Question: Balance the skeletal equation Li(s) +H2O(f)--LiOH(aq)+H2(g)

5. Question: How many atoms of Oarein the molecule of the material Al(NO3)3
6. Question: For the reaction 3Cu(NO3)2 aq +2Na3PO4(aq)-CU3(PO4)2(s)+6NaNO3(aq)
 ,select ALL
of the true statements
7. Question: Aluminum reacts with oxygen according to the following reaction 4Al(s) +302(g)-
2Al2O3(s). If the 12 moles of aluminum react completely with oxygen, how many moles of Al2O3
should form?
8. Question: What is the % concentration of a solution consisting of 60 grams of solute dissolved in
solution with a total volume of500ml?
9. Question: You want to prepare a 1.2 M FeCl3 solution. You only have 6mlof a 3.6 M FeCl3 on
hand .How many ml of 1.2M FeCl3 solution can you prepare ? Show all work

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