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
12345 [234]
2 years ago
9

Simple question plzz help

Chemistry
2 answers:
Galina-37 [17]2 years ago
4 0

Answer:

b?

Explanation:

PSYCHO15rus [73]2 years ago
3 0

Answer:

a  

Explanation:

You might be interested in
Every element and compound has a unique set of properties. True or False?
velikii [3]

Answer:

So the answer to "every element and compound has a unique set of properties. True or False?" is TRUE

Explanation:

6 0
3 years ago
In the dilution process of a solution, the moles of ___________ does not change.
nevsk [136]
Moles of solute does not change.
8 0
3 years ago
How does the use of hydroelectric energy compare to the use of coal?
lora16 [44]
<span>Hydroelectric energy uses the movement of water to spin a turbine and produce electricity. Coal is a fossil fuel that is burned as an energy source, which results in emissions such as carbon dioxide, nitrogen, and sulfur. Coal use is associated with waste products both from the mining process to acquire the coal and also from the actual use of coal itself. Hydroelectric energy does not involve waste, but does pose potential problems to waterways. Coal use is more common than the use of hydroelectric energy.</span>
4 0
3 years ago
Choose the predominant type of bonding as ionic, covalent, or metallic for the substance below.
nadya68 [22]
It is ionic bond because of Na valency and it is alkali metal and cl is non metal and it’s valency , they both share electron and make ionic bonding .
5 0
3 years ago
Read 2 more answers
Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an el
Likurg_2 [28]

Answer: 281 hours

Explanation:-

1 electron carry charge=1.6\times 10^{-19}C

1 mole of electrons contain=6.023\times 10^{23} electrons

Thus  1 mole of electrons carry charge=\frac{1.6\times 10^{-19}}{1}\times 6.023\times 10^{23}=96500C

Cu^{2+}+2e^-\rightarrow Cu

96500\times 2=193000Coloumb of electricity deposits 1 mole or 63.5 g of copper

0.0635 kg of copper is deposited by 193000 Coloumb

11.5 kg of copper is deposited by=\frac{193000}{0.0635}\times 11.5=34952756 Coloumb

Q=I\times t

where Q= quantity of electricity in coloumbs  = 34952756 C

I = current in amperes = 34.5 A

t= time in seconds = ?

34952756 C=34.5A\times t

t=1013123sec=281hours

Thus it will take 281 hours to plate 11.5 kg of copper onto the cathode if the current passed through the cell is held constant at 34.5 A.

8 0
3 years ago
Other questions:
  • A potassium permanganate solution is prepared by dissolving 22.14g of KMnO4 in water and diluting to a total volume of 1.000 L.
    8·1 answer
  • Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this at
    7·1 answer
  • what does the law of conservation of energy state? explain.please help quickly:(((( ill give u brainliest please!!
    8·1 answer
  • T. Svedberg measured the molecular weight of carbonyl hemoglobin by velocity centrifugation. In this experiment, 0.96 g of prote
    5·1 answer
  • The law of conversion states that mass is never created or destroyed. Explain how this law requires all chemical equations to be
    15·1 answer
  • I need to write an essay on the help benefits of plants! You do not need to write an entire essay, but I would like points and w
    14·1 answer
  • What does chlorination do?
    5·1 answer
  • "Para enfriar algo rápidamente se hace una mezcla de hielo con sal o, si tiene precaución, alcohol. El punto de congelación baja
    14·1 answer
  • If the protons are 6 the neutrons are 6 and the electrons are 6 what is the total charge
    9·1 answer
  • Need actual help plsss
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!