Chemistry

Chemistry, 11.07.2019 17:30, dondre54

Why does the level of water not change when common salt is dissolved in water

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Chemistry, 21.07.2019 06:00, kodaxmodz

While studying chemical and physical changes, students added salt to a glass of water. they stirred the salt until it dissolved and could no longer be seen. "that's a chemical change," sarah stated. do you agree? explain. a) yes, it is a chemical change because something new is formed. b) no, it is a physical change. it is salt and water and you can get the salt back by boiling off the water. c) yes, it is a chemical change because there was a change in the appearance of one of the components, the salt. d) no, it is a physical change. a chemical change cannot occur when you mix two compounds together like salt, nacl, and water, h2o, without adding heat.

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Chemistry, 25.09.2019 01:00, xbeatdroperzx

A1-m depth of stagnant water lies on top of a 0.35 cm thickness of nacl. at time t < 0, the water is pure. at time t 0, the salt begins to dissolve into the water. if the concentration of salt in the water at the solid-liquid interface is maintained at saturation (0.00685 mol nacl/cm3) and the diffusivity of nacl is 2.3c-005 cm2/s, independent of concentration, estimate, by assuming the water to act as a semi-infinite medium, the time of salt in the water when: (a) 10% of the salt has dissolved; ; (b) 50% of the salt has dissolved, and (c) 90% of the salt has dissolved. density of nacl 2.165 g/cm3. molecular weight of nacl 58.44 g/mol.

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Chemistry, 26.09.2019 02:50, jfy3341

Select all that apply. salt dissolved in water is a solution, therefore a. salt and water are chemically combined b. salt is not chemically bonded to water c. the quantity of salt and water is fixed d. the ratio of salt to water may vary e. salt and water retain their own chemical properties

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Chemistry, 01.10.2019 11:20, hipeopleitsme121

Select all that apply salt dissolved in water is a solution, therefore a.salt and water are chemically combined b.salt is not chemically bonded to water c.the quantity of salt and water is fixed d.the ratio of salt to water may vary e.salt and water retain their own chemical properties

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