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1. Why is it sometimes possible to loosen steel caps on glass screw-top bottles by dipping...
1.Do countries want to have an even balance of trade? Why or why not? ______________________ If not, which...
1.Do countries want to have an even balance of trade? Why or why not? ______________________ If not, which do they want more of (imports or exports)? Why? What do countries sometimes do if they feel they are losing "power" to try to balance the trade?____________________________. 3. Briefly explain the difference between Capitalism and Socialism. What is your opinion on why it is currently a hot topic in the US? Explain. For example, if you say it is because of politics/election year...then you need to elaborate...
3. Why was the concentration of catechol in test tube 2 and 4? Caps Lo 448...
3. Why was the concentration of catechol in test tube 2 and
4?
Caps Lo 448 1. I You will determine 2. Why Shift 1 he sequence given in the Ctrl record whether or Activity 6 - Enzyme Inhibition This activity will investigate the inhibition of catechol oxidase by phenylthiourea (PTU). You w PTU is a competitive or noncompetitive inhibitor. 1. Write your hypothesis and prediction. 2. Obtain a bottle of PTU. 3. Using Table 6.1, prepare three experimental tubes....
Please give me answers with details.. 1. Why should cotton provide an effective barrier against air...
Please give me answers with details..
1. Why should cotton provide an effective barrier against air contaminants, when the spaces between threads are relatively large? 2. What other ways might be used to close test tubes, still retaining a sound bacteriologic technique? 3. How would you protect culture medium from lint in a liter Erlenmeyer flask in which the cotton plug had to be large? 4. Explain your preference of method for the sterilization of : A hypodermic needle, rubber...
1. Why is it not possible for total internal reflection to occur when a light beam...
1. Why is it not possible for total internal reflection to occur when a light beam is passing from a medium of low optical density (air) into a medium of higher optical density ( glass or water). Explain fully. 2. When light is incident on an interface between two materials, the angle of the refracted ray depends on the wavelength, but the angle of the reflected ray does not. Why should this be true? Explain fully. 3. Sunlight and star...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic solvents? 2. Of the following, which are flammable? Circle all that apply. Acetone Water Ethanol 3. An organic compound (literature mp=255 - 256°C) has the following solubilities: solvent soluble cold soluble hot acetone yes yes water no no ethanol no yes petroleum ether no no Which is the best solvent to recrystallize the organic compound? Why? Why are the other solvents not suitable? Explain...
Lab Exercise: Liquids and Gases Answer Key LAB EXERCISE: LIQUIDS AND GASES Part 1: Buoyancy Fill...
Lab Exercise: Liquids and Gases Answer Key
LAB EXERCISE: LIQUIDS AND GASES Part 1: Buoyancy Fill a large glass half full of water. 1. Carefully place a raw egg in the glass of water. 2. Does the egg sink or float? 3. 4. Based on the results, which do you think is the most dense? The egg or the water? 5. Gradually add salt to the water, stirring after each addition to dissolve it. Careful! Don't break the egg! Keep...
9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A ...
9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A calorimeier is a device u s eol to measure hot of roactisn th lainer wn th vr meni o insulated wall's to prevent hret exchange he enviran 2. Why is specific heat an intensive property? energy at o particular temperature 'is the some Its 9uanhhy towhich no physical alimen sian is agsian eof Nomaler heuw mach alaminunh, Is abiliy to aborb heat...
Nume. _ 1. At the top of Mount Everest, water boils at 70 °C. Explain why...
Nume. _ 1. At the top of Mount Everest, water boils at 70 °C. Explain why this is lower than its usual boiling point of 100°C. 2. a) How much heat is needed to heat 33.9 g of acetone (C.H.O) from 25.0°C to its boiling point of 56.05°C? (Specific heat of acetone is 2.15 J/g.c) b) How much heat is required to vaporize 33.9 g of acetone at its boiling point? (AHvap for acetone is 29.1 kJ/mole) 3. How much...
Homework: Name: 1. At the top of Mount Everest, water boils at 70 °C. Explain why...
Homework: Name: 1. At the top of Mount Everest, water boils at 70 °C. Explain why this is lower than its usual boiling point of 100°C. 2. a) How much heat is needed to heat 33.9 g of acetone (C3H.O) from 25.0°C to its boiling point of 56.05°C? (Specific heat of acetone is 2.15 J/g.C) b) How much heat is required to vaporize 33.9 g of acetone at its boiling point? (AHvap for acetone is 29.1 kJ/mole) 3. How much...
Homework: Name: 1. At the top of Mount Everest, water boils at 70 °C. Explain why...
Homework: Name: 1. At the top of Mount Everest, water boils at 70 °C. Explain why this is lower than its usual boiling point of 100°C. 2. a) How much heat is needed to heat 33.9 g of acetone (C3HO) from 25.0°C to its boiling point of 56.05°C? (Specific heat of acetone is 2.15 J/g.C) b) How much heat is required to vaporize 33.9 g of acetone at its boiling point? (AHvap for acetone is 29.1 kJ/mole) 3. How much...
3. Why was the concentration of catechol in test tube 2 and
4?
Caps Lo 448 1. I You will determine 2. Why Shift 1 he sequence given in the Ctrl record whether or Activity 6 - Enzyme Inhibition This activity will investigate the inhibition of catechol oxidase by phenylthiourea (PTU). You w PTU is a competitive or noncompetitive inhibitor. 1. Write your hypothesis and prediction. 2. Obtain a bottle of PTU. 3. Using Table 6.1, prepare three experimental tubes....
Please give me answers with details..
1. Why should cotton provide an effective barrier against air contaminants, when the spaces between threads are relatively large? 2. What other ways might be used to close test tubes, still retaining a sound bacteriologic technique? 3. How would you protect culture medium from lint in a liter Erlenmeyer flask in which the cotton plug had to be large? 4. Explain your preference of method for the sterilization of : A hypodermic needle, rubber...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic solvents? 2. Of the following, which are flammable? Circle all that apply. Acetone Water Ethanol 3. An organic compound (literature mp=255 - 256°C) has the following solubilities: solvent soluble cold soluble hot acetone yes yes water no no ethanol no yes petroleum ether no no Which is the best solvent to recrystallize the organic compound? Why? Why are the other solvents not suitable? Explain...
Lab Exercise: Liquids and Gases Answer Key
LAB EXERCISE: LIQUIDS AND GASES Part 1: Buoyancy Fill a large glass half full of water. 1. Carefully place a raw egg in the glass of water. 2. Does the egg sink or float? 3. 4. Based on the results, which do you think is the most dense? The egg or the water? 5. Gradually add salt to the water, stirring after each addition to dissolve it. Careful! Don't break the egg! Keep...
9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A calorimeier is a device u s eol to measure hot of roactisn th lainer wn th vr meni o insulated wall's to prevent hret exchange he enviran 2. Why is specific heat an intensive property? energy at o particular temperature 'is the some Its 9uanhhy towhich no physical alimen sian is agsian eof Nomaler heuw mach alaminunh, Is abiliy to aborb heat...
Nume. _ 1. At the top of Mount Everest, water boils at 70 °C. Explain why this is lower than its usual boiling point of 100°C. 2. a) How much heat is needed to heat 33.9 g of acetone (C.H.O) from 25.0°C to its boiling point of 56.05°C? (Specific heat of acetone is 2.15 J/g.c) b) How much heat is required to vaporize 33.9 g of acetone at its boiling point? (AHvap for acetone is 29.1 kJ/mole) 3. How much...
Homework: Name: 1. At the top of Mount Everest, water boils at 70 °C. Explain why this is lower than its usual boiling point of 100°C. 2. a) How much heat is needed to heat 33.9 g of acetone (C3H.O) from 25.0°C to its boiling point of 56.05°C? (Specific heat of acetone is 2.15 J/g.C) b) How much heat is required to vaporize 33.9 g of acetone at its boiling point? (AHvap for acetone is 29.1 kJ/mole) 3. How much...
Homework: Name: 1. At the top of Mount Everest, water boils at 70 °C. Explain why this is lower than its usual boiling point of 100°C. 2. a) How much heat is needed to heat 33.9 g of acetone (C3HO) from 25.0°C to its boiling point of 56.05°C? (Specific heat of acetone is 2.15 J/g.C) b) How much heat is required to vaporize 33.9 g of acetone at its boiling point? (AHvap for acetone is 29.1 kJ/mole) 3. How much...
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