![subject](/tpl/images/cats/himiya.png)
Chemistry, 25.05.2020 20:58 vickygloom
A U. S. penny, which is composed of copper-plat zinc (97.5% Zn, 2.5% Cu), has a mass of 2.500g. Hydrochloric acid (HCl) does not react with copper by it does react with zinc. How many grams of H2 are formed by reacting the zinc in the penny with excess HCl? Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g)
a
0.0301g
b
0.0772g
c
0.151g
d
0.0753g
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 06:30
The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 09:00
George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 16:30
Correct relationship between molecular formula and empirical formula
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 22:30
Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?
Answers: 3
You know the right answer?
A U. S. penny, which is composed of copper-plat zinc (97.5% Zn, 2.5% Cu), has a mass of 2.500g. Hydr...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/himiya.png)
Chemistry, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 27.06.2019 20:30
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/ekonomika.png)
Business, 27.06.2019 20:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 27.06.2019 20:30
![question](/tpl/images/cats/istoriya.png)
History, 27.06.2019 20:30