Physics

Physics, 28.07.2019 00:30, ashlynhenderson0323

Two samples of water sample a mass at 100 g bb mass at 250 g they both have the same initial temperature and are allowed to cool to room temperature what would be the temperature change in sample be compared to sample a

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Chemistry, 24.08.2019 05:10, Day1201

To determine the percentage of water in a hydrated salt, a student heated a 1.2346 g sample of the salt for 30 minutes; when cooled to room temperature, the sample weighed 1.1857 g. after the sample was heated for an additional 10 minutes and again cooled to room temperature, the sample weighed 1.1632 g. which of the following should the student do next? a. use the smallest mass value to calculate the percentage of water in the hydrated salt. b.repeat the experiment with a new sample of the same mass and average the results. c.repeat the experiment with a new sample that has a different mass. d. reheat the sample until its mass is constant. e. use the average of the mass values obtained after the two heatings to calculate the percentage of water in the hydrated salt.

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To determine the percentage of water in a hydrated salt, a student heated a 1.2346 g sample of the salt for 30 minutes; when cooled to room temperature, the sample weighed 1.1857 g. after the sample was heated for an additional 10 minutes and again cooled to room temperature, the sample weighed 1.1632 g. which of the following should the student do next? a. use the smallest mass value to calculate the percentage of water in the hydrated salt. b.repeat the experiment with a new sample of the same mass and average the results. c.repeat the experiment with a new sample that has a different mass. d. reheat the sample until its mass is constant. e. use the average of the mass values obtained after the two heatings to calculate the percentage of water in the hydrated salt.

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Biology, 01.11.2019 00:31, dookeyb2

John is testing the effect of temperature on the solubility of sugar in water, he plans to determine the mass of sugar dissolved in a saturated solution. he will begin with a known mass of sugar and add sugar to water until the solution is saturated. he will then calculate how much sugar dissolved by subtracting the remaining mass from the initial mass he organized data about his experiment in the following table: group a group b group c volume of water 100 ml 25°c 1000 g temperature initial mass of sugar final mass of sugar 800 g which factor should be the same in all three groups? o a. final mass of sugar o b. initial mass of sugar o o c. volume of water d. temperature

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