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A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous COSO Show all calculations necessary to answer the following questions. 1628 g hydrate 1. What was the mass of the hydrate sample? 899 g COSO 2. What is the mass of the anhydrous COSO4? 721 gHO 3. How much water was driven off? 4. What is the percentage of water in the hydrate? mass of water in sample X 100 나나,구8 % H,O % water mass of hydrate sample 5. How many grams of water would there be in 100.0 g of hydrate? How many moles? 나나,78 g H,O; 2.니9 moles H,O 7294 t20 X 1003-44.78 나나, 구8 9 2.49 m /-620, Hydrate Dg/mo 6. How many grams of COSO, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is COSO,? Convert the mass of COSO, to moles. The molar mass of CoSO, is 154.996 g. 4 4 4 g COSO moles CoSO % COSO, in hydrate 7. How many moles of water are present per mole of COSO? 4 moles H,O/moles CoSO 4 8. What is the formula of the hydrate?

A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous COSO Show all calculations necessary to answer the following questions. 1628 g hydrate 1. What was the mass of the hydrate sample? 899 g COSO 2. What is the mass of the anhydrous COSO4? 721 gHO 3. How much water was driven off? 4. What is the percentage of water in the hydrate? mass of water in sample X 100 나나,구8 % H,O % water mass of hydrate sample 5. How many grams of water would there be in 100.0 g of hydrate? How many moles? 나나,78 g H,O; 2.니9 moles H,O 7294 t20 X 1003-44.78 나나, 구8 9 2.49 m /-620, Hydrate Dg/mo 6. How many grams of COSO, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is COSO,? Convert the mass of COSO, to moles. The molar mass of CoSO, is 154.996 g. 4 4 4 g COSO moles CoSO % COSO, in hydrate 7. How many moles of water are present per mole of COSO? 4 moles H,O/moles CoSO 4 8. What is the formula of the hydrate?

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous COSO Show all calculations necessary to answer the following questions. 1628 g hydrate 1. What was the mass of the hydrate sample? 899 g COSO 2. What is the mass of the anhydrous COSO4? 721 gHO 3. How much water was driven off? 4. What is the percentage of water in the hydrate? mass of water in sample X 100 나나,구8 % H,O % water mass of hydrate sample 5. How many grams of water would there be in 100.0 g of hydrate? How many moles? 나나,78 g H,O; 2.니9 moles H,O 7294 t20 X 1003-44.78 나나, 구8 9 2.49 m /-620, Hydrate Dg/mo
Transcribed Image Text:A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 25.050 g for the crucible, cover, and sample. Before adding the sample, the crucible and cover weighed 23.422 g. She then heated the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then let the crucible cool, and found it had a lower mass; the crucible, cover and contents then weighed 24.321 g. In the process the sample was converted to blue anhydrous COSO Show all calculations necessary to answer the following questions. 1628 g hydrate 1. What was the mass of the hydrate sample? 899 g COSO 2. What is the mass of the anhydrous COSO4? 721 gHO 3. How much water was driven off? 4. What is the percentage of water in the hydrate? mass of water in sample X 100 나나,구8 % H,O % water mass of hydrate sample 5. How many grams of water would there be in 100.0 g of hydrate? How many moles? 나나,78 g H,O; 2.니9 moles H,O 7294 t20 X 1003-44.78 나나, 구8 9 2.49 m /-620, Hydrate Dg/mo
6. How many grams of COSO, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is COSO,? Convert the mass of COSO, to moles. The molar mass of CoSO, is 154.996 g. 4 4 4 g COSO moles CoSO % COSO, in hydrate 7. How many moles of water are present per mole of COSO? 4 moles H,O/moles CoSO 4 8. What is the formula of the hydrate?
Transcribed Image Text:6. How many grams of COSO, are there in 100.0 g of hydrate? How many moles? What per- centage of the hydrate is COSO,? Convert the mass of COSO, to moles. The molar mass of CoSO, is 154.996 g. 4 4 4 g COSO moles CoSO % COSO, in hydrate 7. How many moles of water are present per mole of COSO? 4 moles H,O/moles CoSO 4 8. What is the formula of the hydrate?
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