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
Nikolay [14]
3 years ago
11

List the elements in the increasing order of their electronegativity. Give reasons for your answer.

Chemistry
1 answer:
rjkz [21]3 years ago
3 0
It seems to have choices. You can get the electronegativity order from the periodic table of elements. From left to right, the electronegativity will also increase. From top to bottom, it will decrease.
You might be interested in
Atoms and elements are examples of A. molecules. B. mixtures. C. compounds. D. pure substances.
UkoKoshka [18]

Answer:

atom are very tiny partical

3 0
3 years ago
The most common source of copper (cu) is the mineral chalcopyrite (cufes2). how many kilograms of chalcopyrite must be mined to
tigry1 [53]

Answer : 0.8663 Kg of chalcopyrite must be mined to obtained 300 g of pure Cu.

Solution : Given,

Mass of Cu = 300 g

Molar mass of Cu = 63.546 g/mole

Molar mass of CuFeS_2 = 183.511 g/mole

  • First we have to calculate the moles of Cu.

\text{ Moles of Cu}=\frac{\text{ Given mass of Cu}}{\text{ Molar mass of Cu}}= \frac{300g}{63.546g/mole}=4.7209moles

The moles of Cu = 4.7209 moles

From the given chemical formula, CuFeS_2 we conclude that the each mole of compound contain one mole of Cu.

So, The moles of Cu = Moles of CuFeS_2 = 4.4209 moles

  • Now we have to calculate the mass of CuFeS_2.

Mass of CuFeS_2 = Moles of CuFeS_2 × Molar mass of CuFeS_2 = 4.4209 moles × 183.511 g/mole = 866.337 g

Mass of CuFeS_2 = 866.337 g = 0.8663 Kg         (1 Kg = 1000 g)

Therefore, 0.8663 Kg of chalcopyrite must be mined to obtained 300 g of pure Cu.


3 0
3 years ago
Calculate the dissociation constant of nh4oh(aq) if the degree of dissociation of 0.006 mol/kg solution is 0.053 and the activit
Anastasy [175]

The dissociation equation will be

                         NH4OH   --->        NH4+                   + OH-

Initial                 0.006                        0                          0

Change         -0.006 X 0.053        +0.006 X 0.053      -0.006 X 0.053

Equlibrium     0.006 -0.006 X 0.053      0.006 X 0.053    0.006 X 0.053

Ka = [NH4+] [ OH-] / [NH4OH] = (0.006 X 0.053)^2 / 0.006 -0.006 X 0.053

Ka = 1.78 X 10^-5

7 0
3 years ago
What is the mass percentage for copper ?
RideAnS [48]

Answer:

Explanation:

To find the mass percent composition of an element, divide the mass contribution of the element by the total molecular mass. This number must then be multiplied by 100% to be expressed as a percent.

3 0
3 years ago
ASAP!
Sav [38]

When a radioactive isotope releases an alpha particle, the atomic number of the atom is decreased by four.

So, the correct answer is B.

Hope this helps,

Davinia.

4 0
3 years ago
Other questions:
  • QUESTION 33 Which of the following correctly expresses 7,000,000,000 in scientific notation? 70 x 106 7 x 109 .7 x 10-7
    11·1 answer
  • Which liquid has the highest vapor pressure
    13·1 answer
  • You can compress a substances in the gas state, but not in the solid or liquid state. Use the particle theory to explain why?​
    8·2 answers
  • gBe sure to answer all parts. Nicotine can be made when the following ammonium salt is treated with Na2CO3. Determine a stepwise
    10·1 answer
  • Be able to describe the relationship between Freedom of Movement and phase change.
    12·1 answer
  • What are the structures in which stars are grouped together?
    12·1 answer
  • I need help ASAP pls
    8·1 answer
  • A horse runs 1 km in 15 s. What is the average speed
    14·1 answer
  • The pressure of a sample of gas is measured at sea level with an open-end mercury manometer, and the liquid level is 13.7 cm hig
    15·1 answer
  • Substance
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!