![subject](/tpl/images/cats/himiya.png)
Chemistry, 08.12.2021 05:50 dantew8238
9. Zinc and phosphorus react to give zinc phosphide. 9.75 g of zinc combines with 3.1 g of phosphorus
a. Find the empirical formula for the compound. (Ar.: Zn = 65, P = 31.)
b. Calculate the percentage of phosphorus in it.
Pleas help m, thank you
![ansver](/tpl/images/cats/User.png)
Answers: 3
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 21.06.2019 18:30
Calculate the change in entropy if br2(l) is converted to br2(g). s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)
Answers: 3
![question](/tpl/images/cats/himiya.png)
Chemistry, 21.06.2019 18:50
Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 11:40
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
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 14:00
How is the atomic number of a nucleus changed by alpha decay
Answers: 2
You know the right answer?
9. Zinc and phosphorus react to give zinc phosphide. 9.75 g of zinc combines with 3.1 g of phosphoru...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/istoriya.png)
History, 22.02.2021 14:50
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.02.2021 14:50
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 14:50
![question](/tpl/images/cats/mat.png)