![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, 23.06.2019 05:30
Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?
Answers: 1
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 07:30
In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)ï‚®sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 08:30
Of the following elements, which is the least reactive? a. c b. h c. li d. he
Answers: 1
You know the right answer?
Which of the following alcohols is used antifreeze?...
Questions
![question](/tpl/images/cats/ekonomika.png)
Business, 28.08.2019 03:30
![question](/tpl/images/cats/biologiya.png)
Biology, 28.08.2019 03:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.08.2019 03:30
![question](/tpl/images/cats/biologiya.png)
Biology, 28.08.2019 03:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.08.2019 03:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 28.08.2019 03:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.08.2019 03:30
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.08.2019 03:30
![question](/tpl/images/cats/mat.png)
Mathematics, 28.08.2019 03:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)