Homework Answers
Tube wrap with aluminium foil safe it from several external agents like-
1) dirct exposure of light
2) no or less evoporation
3) no dust particlr from outside.
Hope it's clear.. thanks
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2. The tube wrapped in aluminum foil served as a control in today's experiment. What type...
1. In today's experiment, tube 1 represented the blank. Why did we use a complex mixture...
1. In today's experiment, tube 1 represented the blank. Why did we use a complex mixture for a blank instead of just water? (3 points)
List t wo reasons why it is necessary to put a pinhole in the aluminum foil...
List t wo reasons why it is necessary to put a pinhole in the aluminum foil 2. Why was it NOT necessary to clean and dry the flask before performing your second determination? 3. A certain liquid has a molecular weight of 100 g/mole. The following data were obtained for a Dumas molecular weight determination: V-0.265 liters T 372 K and P 1.02 atm g of condensed vapor 0.58 g From this data a molecular weight of 65.5 g/mole was...
ass (g) of Aluminum foil used 0.6551 Mass (g) of filter paper 1.0896 Edit Mass (g)...
ass (g) of Aluminum foil used 0.6551 Mass (g) of filter paper 1.0896 Edit Mass (g) of filter paper and alum Thy 22.7693 Edit Try Ente Tole Thy two Try 2 0.02428 Moles (moles) of aluminum used Thy Thy 2 Adria infor Theoretical yield of slum Actual yield of alum Percent yield (5) of slum NG Why wasn't your actual yield 100% If your Experimental Errors What happened during the experiment that may have alread your res was greater, how...
at is contained in the control tube included in the ABO forward grouping? Why is this...
at is contained in the control tube included in the ABO forward grouping? Why is this tube included? What is the expected result and why? (4 points) What is the expected results when anti-A,B is added to patient cells in the forward tube? Explain. (4 points) 2.
Preface: Aluminum foil was reacted will hydrochloric acid and copper 2 chloride. The copper solid from...
Preface: Aluminum foil was reacted will hydrochloric acid and copper 2 chloride. The copper solid from the reaction was placed on filter paper and dried. Data obtained from the lab is below Data Table Mass of Aluminum: 0.29g Mass of filter paper: 0.35g Mass of reacted filter paper: 0.49g Final mass of Copper: 0.11g 10mL of CuCl2: 0.100 CuCl2 molarity Volume of Copper Solution: ? Moles of Copper: 0.001g (0.1 molarity x 0.01 liters) Write an equation to represent the...
Hydrogen gas was collected in a tube by water displacement like in your experiment, and adjusted...
Hydrogen gas was collected in a tube by water displacement like in your experiment, and adjusted to have pressure inside the tube equal to atmospheric pressure. If the barometer reads 743 mmHg, and the vapor pressure of water is 3 kPa at today's temperature, what is the partial pressure of hvdmpen in the tube?
PRE-LAB QUESTIONS 1. A student did the experiment described except she used Al foil instead of...
PRE-LAB QUESTIONS 1. A student did the experiment described except she used Al foil instead of Mg. Her data table included the following values. Mass of Al 0.0352 g Temperature 19.08 °C Barometric pressure 762.5 mm Hg Volume of H, gas 46.92 mL Answer the following questions based on this data table. a, Write the balanced equation for the reaction between Aluminum and hydrochloric acid. a Al tHCI AIC t3 b. How many moles of Al were consumed? A1-36.989/mot Hnsamed...
What causes the lack of on in tube # 5 that is acting as the control...
What causes the lack of on in tube # 5 that is acting as the control tube? 13. What is the reason for using the control tube What is the reason for 5. used in this exercise 14. What is the relationship between the concentration of pepsin and enzyme activity, as observed on Figure 3-7? 15. How does an increase in the amount of the pepsin, in the test tube, enhance the interaction between pepsin and substrate, thus speeding up...
. HYDROLYSIS WITH ACID (Results AFTER HEATING) Test tube starch + 10%HCIstarch + H20 (control) su...
. HYDROLYSIS WITH ACID (Results AFTER HEATING) Test tube starch + 10%HCIstarch + H20 (control) sucrose+10%HCI Sucrose+ H20 (control) 11%HCl Test tube 2: Test tube 3: Test tube 4: l starch t HO(controll l sucrose + lodine Test Observations: _urnyClicu licu e ? lodine Test Conclusions polysaccharide or not polysaccharide Benedict's Test Observations: Br icv Enc Red Blut Red Blue Benedict's Test Conclusions: reducing sugar present or no reducing sugar present Raducn ar a resen Sugar ga Sugar Students will...
. HYDROLYSIS WITH ACID (Results AFTER HEATING) Test tube starch + 10%HCIstarch + H20 (control) su...
. HYDROLYSIS WITH ACID (Results AFTER HEATING) Test tube starch + 10%HCIstarch + H20 (control) sucrose+10%HCI Sucrose+ H20 (control) 11%HCl Test tube 2: Test tube 3: Test tube 4: l starch t HO(controll l sucrose + lodine Test Observations: _urnyClicu licu e ? lodine Test Conclusions polysaccharide or not polysaccharide Benedict's Test Observations: Br icv Enc Red Blut Red Blue Benedict's Test Conclusions: reducing sugar present or no reducing sugar present Raducn ar a resen Sugar ga Sugar Students will...
1. In today's experiment, tube 1 represented the blank. Why did we use a complex mixture for a blank instead of just water? (3 points)
List t wo reasons why it is necessary to put a pinhole in the aluminum foil 2. Why was it NOT necessary to clean and dry the flask before performing your second determination? 3. A certain liquid has a molecular weight of 100 g/mole. The following data were obtained for a Dumas molecular weight determination: V-0.265 liters T 372 K and P 1.02 atm g of condensed vapor 0.58 g From this data a molecular weight of 65.5 g/mole was...
ass (g) of Aluminum foil used 0.6551 Mass (g) of filter paper 1.0896 Edit Mass (g) of filter paper and alum Thy 22.7693 Edit Try Ente Tole Thy two Try 2 0.02428 Moles (moles) of aluminum used Thy Thy 2 Adria infor Theoretical yield of slum Actual yield of alum Percent yield (5) of slum NG Why wasn't your actual yield 100% If your Experimental Errors What happened during the experiment that may have alread your res was greater, how...
at is contained in the control tube included in the ABO forward grouping? Why is this tube included? What is the expected result and why? (4 points) What is the expected results when anti-A,B is added to patient cells in the forward tube? Explain. (4 points) 2.
Hydrogen gas was collected in a tube by water displacement like in your experiment, and adjusted to have pressure inside the tube equal to atmospheric pressure. If the barometer reads 743 mmHg, and the vapor pressure of water is 3 kPa at today's temperature, what is the partial pressure of hvdmpen in the tube?
PRE-LAB QUESTIONS 1. A student did the experiment described except she used Al foil instead of Mg. Her data table included the following values. Mass of Al 0.0352 g Temperature 19.08 °C Barometric pressure 762.5 mm Hg Volume of H, gas 46.92 mL Answer the following questions based on this data table. a, Write the balanced equation for the reaction between Aluminum and hydrochloric acid. a Al tHCI AIC t3 b. How many moles of Al were consumed? A1-36.989/mot Hnsamed...
What causes the lack of on in tube # 5 that is acting as the control tube? 13. What is the reason for using the control tube What is the reason for 5. used in this exercise 14. What is the relationship between the concentration of pepsin and enzyme activity, as observed on Figure 3-7? 15. How does an increase in the amount of the pepsin, in the test tube, enhance the interaction between pepsin and substrate, thus speeding up...
. HYDROLYSIS WITH ACID (Results AFTER HEATING) Test tube starch + 10%HCIstarch + H20 (control) sucrose+10%HCI Sucrose+ H20 (control) 11%HCl Test tube 2: Test tube 3: Test tube 4: l starch t HO(controll l sucrose + lodine Test Observations: _urnyClicu licu e ? lodine Test Conclusions polysaccharide or not polysaccharide Benedict's Test Observations: Br icv Enc Red Blut Red Blue Benedict's Test Conclusions: reducing sugar present or no reducing sugar present Raducn ar a resen Sugar ga Sugar Students will...
. HYDROLYSIS WITH ACID (Results AFTER HEATING) Test tube starch + 10%HCIstarch + H20 (control) sucrose+10%HCI Sucrose+ H20 (control) 11%HCl Test tube 2: Test tube 3: Test tube 4: l starch t HO(controll l sucrose + lodine Test Observations: _urnyClicu licu e ? lodine Test Conclusions polysaccharide or not polysaccharide Benedict's Test Observations: Br icv Enc Red Blut Red Blue Benedict's Test Conclusions: reducing sugar present or no reducing sugar present Raducn ar a resen Sugar ga Sugar Students will...
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