Francis is learning about dissolving at school. She reads descriptions about the rate of dissolving from four of her friends.
George: The rate of dissolving can be fast or slow. The only thing you can do to speed up the rate of dissolving is to make the temperature hotter.
Manuel: The rate of dissolving can change. The rate of dissolving gets faster when the particles are smaller, the temperature is hotter, or the mixture is stirred.
Kim: The rate of dissolving speeds up when the particles are larger and the temperature is hotter. Stirring the mixture also helps increase the rate of dissolving.
Chris: The rate of dissolving can speed up or slow down. Heating a mixture, stirring a mixture, or using smaller particles will slow down the rate of dissolving.
Which of her friends has the best description about the rate of dissolving?
A George
B Manuel
C Kim
D Chris
Answers: 2
Chemistry, 23.06.2019 08:00, yddlex
Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.
Answers: 3
Chemistry, 23.06.2019 09:20, weridness80
Which of the following occurs along coasts during the day?
Answers: 3
Francis is learning about dissolving at school. She reads descriptions about the rate of dissolving...
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