![answer](/tpl/images/cats/otvet.png)
Answers: 3
Other questions on the subject: Chemistry
![image](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 07:30, zamirareece17
1. list three scientific reasons cockroaches may fly.
Answers: 1
![image](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 11:40, Wemaybewrong
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
![image](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 12:30, nekathadon
The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms
Answers: 1
![image](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 18:30, chinadoll24
Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o sncl2•4h2o sncl2•6h2o
Answers: 2
Do you know the correct answer?
Do u read a graduated cylinder from bottom to top?...
Questions in other subjects:
![Konu](/tpl/images/cats/istoriya.png)
History, 29.01.2020 14:59
![Konu](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 29.01.2020 14:59
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/fizika.png)
Physics, 29.01.2020 14:59
![Konu](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 29.01.2020 14:59
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/geografiya.png)
Geography, 29.01.2020 14:59
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.01.2020 14:59
![Konu](/tpl/images/cats/ekonomika.png)
Business, 29.01.2020 14:59