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
Sauron [17]
4 years ago
8

The most common source of copper (cu) is the mineral chalcopyrite (cufes2). how many kilograms of chalcopyrite must be mined to

obtain 370. g of pure cu?
Chemistry
1 answer:
ser-zykov [4K]4 years ago
4 0
The formula of chalcopyrite is CuFeS₂.
The molar mass of chalcopyrite   - 183.5 g/mol
The mass of Cu in 1 mol of chalcopyrite is - 63.5 g
When 183.5 g of chalcopyrite is mined, the mass of Cu obtained - 63.5 g
So if 63.g of Cu is needed mass of chalcopyrite required - 183.5 g 
Then to gain 370 g of pure Cu - mass of chalcopyrite needed -183.5/63.5 x 370
therefore mass of chalcopyrite to be mined - 1069.21 g 

You might be interested in
In the following balanced neutralization reaction equation, how many moles of Ca(OH)2 are required to completely neutralize 1.2
Roman55 [17]
0.6 moles is the answer
5 0
3 years ago
Read 2 more answers
How does bonding and antibonding molecular orbitals interaction stabilize Molecules?
elena-s [515]

Answer:

Both decrease the energy of the atomic orbitals to form the molecule by their overlap

Explanation:

Many molecules are not described correctly by Lewis theory. For example, diborane (B2H6), which is an electrodeficient compound: there are not enough valence electrons to be able to assign a Lewis structure.

The theory of binding and anti-binding orbitals describes molecular orbitals, whose atomic orbitals overlap to form them. Two atomic orbitals overlap giving a binding orbital molecular orbital. In the binder, the electrons that occupy it have a high possibility of being located between the atoms, so filling stabilizes the molecule. In an anti-binding orbital, the electrons that occupy it have a low probability of being located between the atoms, so that their filling destabilizes the molecule.

The interaction between two atomic orbitals is greater the greater their overlap and the smaller their energy difference.

5 0
4 years ago
You have 4 moles of a gas in a 50 L container held at 2 atm pressure. Currently the temperature is 27 ºC. R = 0.0821 L*atm/(mol*
Mariulka [41]
The formula used for determining gas pressure, volume and temperature interaction would be PV=nRT. 

<span>• What is the temperature in Kelvins?
</span>You already right at this part. Kelvin temperature formula from celsius should be:
K= C+273.15= 
<span>K= 27 +273.15 = 300.15 
It is important to remember that the formula in this question is using Kelvin unit at temperature, not Celcius or Fahrenheit.
</span>
<span>• Assuming that everything else remains constant, what will happen to the pressure if the temperature decreases to -15 ºC?
</span>In this case, the temperature is decreased from 27C into -15C and you asked the change in the pressure.
Using PV=nRT formula, you can derive that the temperature will be directly related to pressure. If the temperature decreased, the pressure will be decreased too. 

<span> If you increase the number of moles to 6 moles, increase temperature to 400K and reduce the volume to 25 L, what will the new pressure be?
</span>PV=nRT
P= nRT/V
P= 6 moles* <span>0.0821 L*atm/(mol*K) * 400K/25L= 7.8816 atm</span>
3 0
3 years ago
Which of the following describes a reaction that reaches equilibrium?
alexandr1967 [171]

Answer:The product and reactants reach a final, unchanging level.

8 0
3 years ago
Which factor affects a solute's solubility rather than its rate of solution?
Illusion [34]

Answer: A

Explanation:

I took the test it was A

4 0
3 years ago
Other questions:
  • At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.600 M. N2(g)+O2(g)↽−−⇀2NO(g) If
    8·1 answer
  • How does your nervous system respond to a stimulus such as a loud noise, a hot object, or a sudden change in temperature?
    15·1 answer
  • When 125 ml of 0.500 m agno3 is added to 100. ml of 0.300 m nh4cl, how many grams of agcl are formed? agno3(aq) + nh4cl(aq) → ag
    8·1 answer
  • Solution ,colloid ,or suspension
    6·2 answers
  • Determine the energy in joules of a photon whose frequency is 3.55 x 10 to the 17 power Hz.
    8·1 answer
  • _are structures that allow for one-way blood flow through the heart HELP!!!!
    8·2 answers
  • A uranium atom has 92 protons in it nucleus use what you know about atoms to predict how many electrons a neutral uranium atom h
    8·1 answer
  • Why is it important for the appendages of an arthropod to be joined
    12·1 answer
  • What is the wavelength of a photon with an energy of 4.56 *10^-19 J
    7·2 answers
  • Lennon-7<br> which cell is known as active cell<br>-​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!