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Frecze-drying is a process used to preserve food. If strawberries are to be freeze-dried, then they would be frozen to
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Chemistry: The Molecular Nature of Matter
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- In the northern United States, summer cottages are usually closed up for the winter. When doing so, the owners winterize the plumbing by putting antifreeze in the toilet tanks, for example. Will adding 525 g of HOCH2CH2OH to 3.00 kg of water ensure that the water will not freeze at 25 C?arrow_forwardCalculate the heat change in joules for freezing 235 gg of water at 0 ∘C∘C.arrow_forwardCalculate the heat change in kilojoules for freezing 90.0 g of water at 0 ∘C.arrow_forward
- A student heats water to make spaghetti. The student observes that the water in the pot is converted to steam. At the same time, the student observes water droplets sliding down the kitchen window. Which change of state is happening over the pot and which change of state is happening on the kitchen window? The water in the pot is boiling and the water on the kitchen window is condensing. The water in the pot is boiling and the water on the kitchen window is melting. The water in the pot is evaporating and the water on the kitchen window is boiling. The water in the pot is condensing and the water on the kitchen window is boiling.arrow_forwardA student leaving campus for spring break wants to make sure the air in her dorm room has a high water vapor pressure so that her plants are comfortable. The dorm room measures 3.25 m × 4.03 m × 3.04 m and the student places a pan containing 0.580 L of water in the room. Assume that the room is airtight, that there is no water vapor in the air when she closes the door, and that the temperature remains a constant 22 °C. The vapor pressure of water at 22 °C is 19.8 mm Hg. Calculate the pressure that the water vapor would exert if all of the liquid water evaporated. mm Hg Will all of the water in the pan evaporate?arrow_forwardIn a body of water, the surface tension caused by the attraction between water molecules is strong. Which of the following is a consequence of this property? Water is considered to be a universal solvent. When water freezes, the molecules move farther apart. Only a limited amount of solute can be dissolved in a sample of water. Objects with a higher density than water can be observed floating on water.arrow_forward
- During a phase change, the temperature remains constant although heat is still being added. What is the best explanation for what the heat energy is being used to do? moving the particles closer together breaking chemical bonds to form brand new substances increasing the movement of particles weakening or breaking the intermolecular forcesarrow_forwardFour liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution freezing point boiling point 8.0 g of sodium acetate (NaCH3CO2) dissolved in 300. mL of water (choose one) ♥ (choose one) v 8.0 g of propylene glycol (C3H8O2) dissolved in 300. mL of water [(choose one) ♥ (choose one) ♥ 8.0 g of hydroiodic acid (HI) dissolved in 300. mL of water (choose one) v (choose one) v 300. mL of pure water (choose one) (choose one)arrow_forwardFour liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is /1.00gmL . solution freezing point boiling point 6.5 g of glycerin (C3H8O3) dissolved in 500. mL of water (choose one)1(lowest)234(highest) (choose one)1(lowest)234(highest) 6.5 g of potassium chloride (KCl) dissolved in 500. mL of water (choose one)1(lowest)234(highest) (choose one)1(lowest)234(highest) 6.5 g of potassium sulfate (K2SO4) dissolved in 500. mL of water (choose one)1(lowest)234(highest)…arrow_forward
- Four liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution 3.5 g of sucrose (C12H22011) dissolved in 250. mL of water 3.5 g of hydroiodic acid (HI) dissolved in 250. mL of water 3.5 g of potassium sulfate (K₂SO4) dissolved in 250. mL of water 250. mL of pure water freezing point ✓ (choose one) 1(lowest) 2 3 4(highest) (choose one) boiling point (choose one) V (choose one) ✓ (choose one) ✓ (choose one)arrow_forwardFour liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution 8.7 g of hydrochloric acid (HCI) dissolved in 450. mL of water 8.7 g of propylene glycol (C3H8O2) dissolved in 450. mL of water 8.7 g of glycerin (C3H8O3) dissolved in 450. mL of water 450. mL of pure water freezing point (choose one) O (choose one) (choose one) (choose one) X boiling point (choose one) O (choose one) O (choose one) O (choose one) O Śarrow_forwardFour liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points. For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on. Note: the density of water is 1.00 g/mL. solution 10. g of glycerin (C3H8O3) dissolved in 100. mL of water 10. g of hydrochloric acid (HCI) dissolved in 100. mL of water 10. g of potassium hydroxide (KOH) dissolved in 100. mL of water 100. mL of pure water freezing point (choose one) (choose one) (choose one) (choose one) X boiling point (choose one) O (choose one) (choose one) 0 (choose one) O 5arrow_forward
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