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These should be the question. 98% that they are the exact questions.<br />1. The percentage yield for the reaction is 83.2%. What mass of PCl3 is expected from the reaction of 73.7g of PCl3 with excess (not sure) carbon?<br />PCl3+Cl2PCl3<br />2. If 2.50 mols of copper and 5.50 mol of silver nitrate are available to react by single replacement, identify the limiting reactant.<br />a. Determine the amount on moles of the excess reactant.<br />b. Determine the mass of mass of each product formed.<br />3. Magnesium hydroxide reacts with ammonium sulfate to produce magnesium sulfate, water, & ammonia gas. How many grams of magnesium hydroxide are needed to produce 50 liters of ammonia (NH3?)<br />4. The compound methyl butanoate smells like apples. Its percent composition is 58.8%C, 9.8%H, and 31.4%O. Methyl butanoate’s molar mass is 102 g/mol, what is its molecular formula? (Calculate empirical formula first)<br />5. Potassium reacts very violently with water to form potassium hydroxide & hydrogen gas. Carlos wants to watch potassium explode in water so he decides to put 845g of potassium into a glass cup of 980g of boiling water. How many moles of hydrogen gas exploded? <br />6. CH3NH2 (g) + 02(g) CO2 (g) + H20(g) + N2(g) (look closely at this equation)<br />Suppose 312 grams of methylamine (CH3NH2) and 475 grams of oxygen are mixed together.<br />a. How many grams of water should be produced?<br />b. What is the theoretical yield of nitrogen?<br />c. What is the percent yield of water of 180 grams is actually produced?<br />7. Copper can be extracted from copper (II) oxide by reduction (not sure) with methane. The unbalanced reaction is: CuO + CH4 Cu+ CO2 + H2O<br />Calculate the amount of copper than can be produced from 100.0 g (not sure) if copper (II).<br />8. Magnesium is obtained from sea water. Ca(OH)2 is added to sea water to precipitate Mg(OH)2. The precipitate is filtered and reacted with HCl to produce MgCl2. The MgCl2 is electrolyzed to produce Mg and Cl2. If 185.0 g of magnesium are recovered from 1000g MgCl2, what is the percent yield for this equation?<br />9. Which of the following compounds has the highest iron percentage? <br />a. FeCl2c. Fe(OH)2<br />b. Fe(C2H2O2)3d. FeO<br />10. Sodium lithium hydroxide is used in space vehicles to remove exhaled carbon dioxide from the living environment by forming solid lithium carbonate and liquid water. What mass of gaseous carbon dioxide can be absorbed by 1kg of lithium hydroxide?<br />
Chemstry test

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Chemstry test

  • 1. These should be the question. 98% that they are the exact questions.<br />1. The percentage yield for the reaction is 83.2%. What mass of PCl3 is expected from the reaction of 73.7g of PCl3 with excess (not sure) carbon?<br />PCl3+Cl2PCl3<br />2. If 2.50 mols of copper and 5.50 mol of silver nitrate are available to react by single replacement, identify the limiting reactant.<br />a. Determine the amount on moles of the excess reactant.<br />b. Determine the mass of mass of each product formed.<br />3. Magnesium hydroxide reacts with ammonium sulfate to produce magnesium sulfate, water, & ammonia gas. How many grams of magnesium hydroxide are needed to produce 50 liters of ammonia (NH3?)<br />4. The compound methyl butanoate smells like apples. Its percent composition is 58.8%C, 9.8%H, and 31.4%O. Methyl butanoate’s molar mass is 102 g/mol, what is its molecular formula? (Calculate empirical formula first)<br />5. Potassium reacts very violently with water to form potassium hydroxide & hydrogen gas. Carlos wants to watch potassium explode in water so he decides to put 845g of potassium into a glass cup of 980g of boiling water. How many moles of hydrogen gas exploded? <br />6. CH3NH2 (g) + 02(g) CO2 (g) + H20(g) + N2(g) (look closely at this equation)<br />Suppose 312 grams of methylamine (CH3NH2) and 475 grams of oxygen are mixed together.<br />a. How many grams of water should be produced?<br />b. What is the theoretical yield of nitrogen?<br />c. What is the percent yield of water of 180 grams is actually produced?<br />7. Copper can be extracted from copper (II) oxide by reduction (not sure) with methane. The unbalanced reaction is: CuO + CH4 Cu+ CO2 + H2O<br />Calculate the amount of copper than can be produced from 100.0 g (not sure) if copper (II).<br />8. Magnesium is obtained from sea water. Ca(OH)2 is added to sea water to precipitate Mg(OH)2. The precipitate is filtered and reacted with HCl to produce MgCl2. The MgCl2 is electrolyzed to produce Mg and Cl2. If 185.0 g of magnesium are recovered from 1000g MgCl2, what is the percent yield for this equation?<br />9. Which of the following compounds has the highest iron percentage? <br />a. FeCl2c. Fe(OH)2<br />b. Fe(C2H2O2)3d. FeO<br />10. Sodium lithium hydroxide is used in space vehicles to remove exhaled carbon dioxide from the living environment by forming solid lithium carbonate and liquid water. What mass of gaseous carbon dioxide can be absorbed by 1kg of lithium hydroxide?<br />