I need help on first wuestion
...
![ansver](/tpl/images/cats/User.png)
Answers: 3
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
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
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 11:00
Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 22:30
Rank the four gases (air, exhaled air, gas produced from from decomposition of h2o2, gas from decomposition of nahco3) in order of increasing concentration of co2
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 09:00
What properties would have caused early researchers to name hydrogen "inflammable air”
Answers: 3
You know the right answer?
Questions
![question](/tpl/images/cats/fizika.png)
Physics, 25.10.2019 23:43
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 25.10.2019 23:43
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 25.10.2019 23:43
![question](/tpl/images/cats/health.png)
Health, 25.10.2019 23:43
![question](/tpl/images/cats/istoriya.png)
History, 25.10.2019 23:43
![question](/tpl/images/cats/mat.png)
Mathematics, 25.10.2019 23:43
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 25.10.2019 23:43
![question](/tpl/images/cats/biologiya.png)
Biology, 25.10.2019 23:43
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/ekonomika.png)
Business, 25.10.2019 23:43
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.10.2019 23:43
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.10.2019 23:43
![question](/tpl/images/cats/en.png)
English, 25.10.2019 23:43