Chemistry

Chemistry, 26.08.2019 17:00, allisonklinger1786

What happens to water when dry ice is added?

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Biology, 08.07.2019 04:00, briannamaee13

Bromothymol blue is an indicator that can be used to determine the effects photosynthesis and cellular respiration. as more co2 is added, it turns yellow. when more o2 is added, it turns blue. a plant is placed in water while a student blows bubbles into the water with bromothymol blue. the water turns yellow. after 15 minutes, the water returns to a blue-ish color. how more o2 added, causing the water turn back to blue?

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Chemistry, 14.07.2019 13:10, kyliegriffis

Part a. the mass of khc8h4o4 is measured to the nearest milligram; however, the volume of water in which it is dissolved is never of concern water is even added to the wall of the erlenmeyer flask during the titration. explain why water added to the khc8h4o4 has no effect on the data, whereas water added to the naoh solution may drastically affect the data.

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Chemistry, 01.08.2019 08:20, tintlemax6256

Astudent added 5.350 g of ammonium chloride to 100.00 cm3 of water. the initial temperature of the water was 25.55℃ but it decreased to 21.79℃. calculate the enthalpy change that would occur when 1 mol of the solute is added to 1.0000 dm3 of water.

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Biology, 08.10.2019 20:10, rafamoreura

Agroup of single-cell organisms collected from the ocean was brought into the lab for examination. the lab assistant was concerned that the water had become full of toxic waste products and so added clean water to the culture. all of the organisms died, and when she looked at them under the microscope, all she could see were bits and pieces of them scattered throughout the water. what likely happened? (a) she added water that was hypertonic to the culture of organisms, and they ruptured. (b) she added water that was hydrophobic to the culture of organisms, and they ruptured. (c) she added water that was hypotonic to the culture of organisms, and they ruptured. (d) she added water that was hydrophilic to the culture of organisms, and they ruptured.

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