Chemistry, 10.07.2019 10:30 autumnofsolace10
Read the excerpt from a reading passage titled "matter and energy: evaporation and condensation." condensation an example of condensation can be seen when drops of water form on the outside of a glass of ice water. the drops seem to appear from nowhere, but they actually form from water vapor in the air. the dew that forms on grass overnight is another example of condensation. condensation happens when molecules in a gas cool down. as the molecules lose heat, they lose energy. as a result they slow down. they move closer to other gas molecules. finally these molecules collect together to form a liquid. (source: encyclopaedia britannica, adapted by newsela staff, 06/02/2017) describe the process of how dew forms on a blade of grass. a. dew forms on grass as water vapor warms up on blades of grass overnight. b. dew forms on grass when water vapor forms when molecules cool and separate. c. dew forms on grass when water vapor forms when molecules cool and join together. d. dew forms on grass when water vapor forms when liquid cools and becomes a gas.
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Chemistry, 22.06.2019 16:50, TrueKing184
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
Chemistry, 22.06.2019 21:50, donttrip10
What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state. a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car
Answers: 2
Read the excerpt from a reading passage titled "matter and energy: evaporation and condensation." c...
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