Тус естатсутс остро The amount of water in the sample
Three identical size beakers - each contained a different liquid, all the same 1 point
temperature, all on the same hot plate. Which of the following observations
would provide evidence that the amount of heat required to raise the
temperature of matter depends on the nature of the matter? *
Before heating, the initial masses of the three different liquids were slightly different.
After turning off the hot plates, all the liquids eventually returned to room
temperature.
Some of the heat from the liquids was transferred to the air around the beakers.
After the same amount of time, the three samples were at different temperatures.
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Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.