1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rzqust [24]
2 years ago
15

Pls help ill mark you brainlist asap pls

Chemistry
1 answer:
Furkat [3]2 years ago
3 0

Answer:

Add Copper(II) oxide, CuO, to an aqueous solution of hydrochloric acid, HCl, to produce the salt copper chloride, CuCl2. To obtain a pure, dry sample of the salt, remove excess, undissolved CuO through filtration. Then heat the system to evaporate water, leaving behind pure Copper(II) Oxide.

You might be interested in
What subatomic particle gives off visible light when it drops back down to a lower energy state?
Black_prince [1.1K]
The subatomic particle that gives off visible light is electrons
4 0
4 years ago
How can you tell whether one glass of water has more thermal energy than another, identical glass of water
kumpel [21]
You can know which one has more thermal energy by testing the temperature, if it is warmer the more energy it has because the particles are going faster than they would if it was cold. because, when its cold the particles slow down until they are so cold they are frozen. (ice).
8 0
4 years ago
Read 2 more answers
What is the effect of tap water, sea water, and rainwater on the rusting rate of iron?
UkoKoshka [18]

Answer:

The more acidic the solution the faster it rusts. More Na = more rust

Explanation:

4 0
3 years ago
Calculate the cell potential E at 25°C for the reaction 2 Al(s) + 3 Fe2+(aq) → 2 Al3+(aq) + 3 Fe(s) given that [Fe 2+] = 0.020 M
Elodia [21]

Answer:

1.18 V

Explanation:

The given cell is:

Al(s)/Al^{3+}(0.10M)||Fe^{2+}(0.020M)/Fe(s)

Half reactions for the given cell follows:

Oxidation half reaction: Al(s)\rightarrow Al^{3+}(0.10M)+2e^-;E^o_{Al^{3+}/Al}=-1.66V

Reduction half reaction: Fe^{2+}(0.020M)+2e^-\rightarrow Fe(s);E^o_{Fe^{2+}/Fe}=-0.45V

Multiply Oxidation half reaction by 2 and Reduction half reaction by 3

Net reaction: 2Al(s)+3Fe^{2+}(0.020M)\rightarrow 2Al^{3+}(0.10M)+3Fe(s)

Oxidation reaction occurs at anode and reduction reaction occurs at cathode.

To calculate the E^o_{cell} of the reaction, we use the equation:

E^o_{cell}=E^o_{cathode}-E^o_{anode}

Putting values in above equation, we get:

E^o_{cell}=-0.45-(-1.66)=1.21V

To calculate the EMF of the cell, we use the Nernst equation, which is:

E_{cell}=E^o_{cell}-\frac{0.059}{n}\log \frac{[Al^{3+}]^2}{[Fe^{2+}]^3}

where,

E_{cell} = electrode potential of the cell = ?V

E^o_{cell} = standard electrode potential of the cell = +1.21 V

n = number of electrons exchanged = 6

Putting values in above equation, we get:

E_{cell}=1.21-\frac{0.059}{6}\times \log(\frac{0.10^2}{0.020^3})\\\\E_{cell}=1.18V

5 0
4 years ago
This alkene can be prepared via Wittig reaction. Draw structural formulas for the aldehyde and the Wittig reagent.
Bad White [126]

Answer:

aldehyde and wittig reagent

Explanation:

Alkenes are the organic compounds with at least one c=c. They are homologous series with the general molecular formula of CnH2n.

The symbol R in the uploaded file is an alkyl, which has general formula of CnH2n+1.

Wittig reagent contains Phosphine with phosphorus and an oxygen atom  the number (n) in the alkyl groups determines the number of carbon atoms in the resulting alkene.  

Download docx
7 0
4 years ago
Read 2 more answers
Other questions:
  • Element that is rolled into a foil found and used in your kitchen
    5·1 answer
  • Rank the following forms of precipitation from least to dangerous. Explain why you ranked them this way.
    5·1 answer
  • Al (s) + CuSO4 (aq) → Cu (s) + Al2(SO4)3 (aq)
    5·1 answer
  • Reactions which give out energy are endothermic
    6·1 answer
  • Suppose an electron is transferred from a potassium atom to an unknown halogen atom. For which of the following halogen atoms wo
    11·1 answer
  • What is 2 multiplied by 4<br>​
    13·2 answers
  • Help ........,,,,.........
    12·1 answer
  • In addition to how much force Earth exerts on the object, which features of an object affect its weight? edginuity
    14·1 answer
  • Taro plants, which are native to Africa, were introduced into Florida's wetland biome in 1910. Today taro plants grow wild in th
    12·1 answer
  • What is the predicted change in the boiling point of water when 1.50 g of
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!