Chemistry, 13.10.2020 02:01 ecoagro1934
For the following situations, describe the contact and non-contact forces that are involved
, a. A book sitting on a shelf
b. A soccer player kicking a ball; the ball soaring through the air and landing on the ground
C. A hiker in the woods reading her compass to determine which direction to go
d. A child on a sled; first, the child is sitting at the top of the hill, waiting his tum; then, the child pushes off and slides down the hill, eventually coming to a stop.
Btw this is asking for you to describe the contact and non contact forces involved in all the little sentences
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1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.
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At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure
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For the following situations, describe the contact and non-contact forces that are involved
, a. A...
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