Chemistry, 30.09.2019 17:20 csciahetano
Which two structures would provide a positive identification of an animal cell under a microscope?
answers:
1: plasma membrane, endoplasmic reticulum
2: golgi apparatus, mitochondrion
3: lysosome, flagellum
4: cell wall, chromatin
Answers: 1
Chemistry, 21.06.2019 16:30
Acetic acid, hc2h3o2, dissolves and completely dissociates in water and a solvation sphere of water molecules forms around the ions. this solute-solvent interaction
Answers: 1
Chemistry, 22.06.2019 01:20
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.
Answers: 2
Chemistry, 22.06.2019 01:50
7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '
Answers: 1
Which two structures would provide a positive identification of an animal cell under a microscope? <...
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