For a lab, would it be best to store water in: glass or a LDPE plastic?...
For a lab, would it be best to store water in: glass or a LDPE plastic? The glass bottle would create dipole bonds with the water, but the plastic would release polyethylenes (but slower and less b/c it is LDPE). They both have negatives, but which would be not as bad, and why?
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For a lab, would it be best to store water in: glass or a LDPE
plastic?...
What is the best bottle to store water in to use for a lab sample and...
What is the best bottle to store water in to use for a lab sample and why? So, would it be better to store water (for a lab, and to keep it at its best quality and no new compounds mixing in with the water) in plastic, glass, or metal and why?
19. Which is the best reason for why water in a glass capillary has a concave...
19. Which is the best reason for why water in a glass capillary has a concave meniscus, while mercury in a glass capillary has a convex meniscus? A) The water is attracted more strongly to the glass than the mercury is attracted to - the glass. B) Mercury has a greater dispersion force than water. C) Water is a molecular compound while mercury is a metallic element. D) Water has a greater dispersion force than mercury E) Th e mercury...
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...
Physics: Electricity and Magnetism
A dipole consisting of two oppositely charged balls connected by a wooden stick is located as shown in the diagram at right. A block of plastic is located nearby,as shown. Locations B, C, and D all lie on a line perpendicular to the axis of the dipole, passing through the midpoint of the dipole.Before selecting answers to the following questions, draw your own diagram of this situation, showing all the fields and charge distributionsrequested..Answer the following questions by selecting either...
If you have a glass of store bought apple juice to test for biomolecules, which biomolecules...
If you have a glass of store bought apple juice to test for biomolecules, which biomolecules out of the list below would be detected in it? A) simple sugars B) lipids C) proteins D) nucleic acids
2. One student at a restaurant asks for water with lots of ice, while another asks...
2. One student at a restaurant asks for water with lots of ice, while another asks for only a little ice. The waiter uses bottled water from the same bottle and ice from the same ice bucket to fill the order. There is still ice in both glasses when the water comes to thermal equilibrium Will the temperature of the water in the glass with only a little ice be (a) greater than (b) less than, or (c) the same...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have been affected? The heat of combustion of octane, C,H,. can be measured in a way similar to the method youC used to measure the heat of neutralization. The bomb calorimeter is used instead of a coffee cup. The reaction is 2C,H,1)+ 25 O, (g) 16 CO, (g) +...
EI. A Watched Pot... When heating water on a stove, a full pan of water takes...
EI. A Watched Pot... When heating water on a stove, a full pan of water takes longer to reach the boiling point than if the pan is half full. Why? Explain using the appropriate formula. E2. A Pressing Matter! We viewed a video of Rodrigo smacking the top of a bottle full of water with his palm. Then, the BOTTOM of the bottle broke and the water rushed out. WHY? did this happen? a. (10) Name and State the important...
IODOMETRIC TITRATION P Matching: Choose the best answer (10 points) 1. The water used to prepare...
IODOMETRIC TITRATION P Matching: Choose the best answer (10 points) 1. The water used to prepare the thiosulfate solution must be 2. E is added to the thiosulfate solution to bring up pH value to 9. 3. The thiosulfate solution must be store in 4. A is added to the 10; mixture to make it slightly acidic. 5. Must the above solution me be titrated immediately? B is the primary standard 7. is the mole ratio for the reaction of...
4. How much energy is needed to convert 64.09 grams of water at 100.°C to steam...
4. How much energy is needed to convert 64.09 grams of water at 100.°C to steam at 128.40 °C? specific heat (steam) = 2.09 J/g°C specific heat (water) = 4.18 J/g°C heat of fusion = 6.02 kJ/mol heat of vaporization = 40.6 kJ/mol 144.42 kJ 25.21 kJ 152.03 kJ 3.80 kJ 148.23 kJ 5. The charges with sodium chloride are all balanced-for every positive sodium ion there is a corresponding negative chloride ion. Since its charges...
19. Which is the best reason for why water in a glass capillary has a concave meniscus, while mercury in a glass capillary has a convex meniscus? A) The water is attracted more strongly to the glass than the mercury is attracted to - the glass. B) Mercury has a greater dispersion force than water. C) Water is a molecular compound while mercury is a metallic element. D) Water has a greater dispersion force than mercury E) Th e mercury...
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...
A dipole consisting of two oppositely charged balls connected by a wooden stick is located as shown in the diagram at right. A block of plastic is located nearby,as shown. Locations B, C, and D all lie on a line perpendicular to the axis of the dipole, passing through the midpoint of the dipole.Before selecting answers to the following questions, draw your own diagram of this situation, showing all the fields and charge distributionsrequested..Answer the following questions by selecting either...
2. One student at a restaurant asks for water with lots of ice, while another asks for only a little ice. The waiter uses bottled water from the same bottle and ice from the same ice bucket to fill the order. There is still ice in both glasses when the water comes to thermal equilibrium Will the temperature of the water in the glass with only a little ice be (a) greater than (b) less than, or (c) the same...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have been affected? The heat of combustion of octane, C,H,. can be measured in a way similar to the method youC used to measure the heat of neutralization. The bomb calorimeter is used instead of a coffee cup. The reaction is 2C,H,1)+ 25 O, (g) 16 CO, (g) +...
EI. A Watched Pot... When heating water on a stove, a full pan of water takes longer to reach the boiling point than if the pan is half full. Why? Explain using the appropriate formula. E2. A Pressing Matter! We viewed a video of Rodrigo smacking the top of a bottle full of water with his palm. Then, the BOTTOM of the bottle broke and the water rushed out. WHY? did this happen? a. (10) Name and State the important...
IODOMETRIC TITRATION P Matching: Choose the best answer (10 points) 1. The water used to prepare the thiosulfate solution must be 2. E is added to the thiosulfate solution to bring up pH value to 9. 3. The thiosulfate solution must be store in 4. A is added to the 10; mixture to make it slightly acidic. 5. Must the above solution me be titrated immediately? B is the primary standard 7. is the mole ratio for the reaction of...
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