Please help me , I’ve been struggling this for 2 days
...
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
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 09:00
Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 12:20
The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397
Answers: 2
![question](/tpl/images/cats/himiya.png)
You know the right answer?
Questions
![question](/tpl/images/cats/istoriya.png)
History, 26.02.2020 01:46
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.02.2020 01:46
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.02.2020 01:46
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.02.2020 01:46
![question](/tpl/images/cats/mat.png)
Mathematics, 26.02.2020 01:46
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.02.2020 01:46
![question](/tpl/images/cats/User.png)
![question](/tpl/images/cats/fizika.png)
Physics, 26.02.2020 01:47
![question](/tpl/images/cats/ekonomika.png)