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
slamgirl [31]
3 years ago
14

Consider the statement: "Copper is a red-brown element obtained from copper sulfide ores by heating the ores in air, which forms

copper oxide. Heating the copper oxide with carbon produces impure copper, which is purified by electrolysis." How many of these, I) color II) heating with carbon III) purification by electrolysis are physical properties or changes?
Chemistry
1 answer:
Misha Larkins [42]3 years ago
4 0

Answer:

1, just I) color.

Explanation:

Physical properties are the properties that can be observed without changing the composition of a substance, such as color, temperature, density, and boiling point.

A physical change is a change in the substance that only modifies its aggregation state, such as solidification, and boiling.

Chemical properties are the properties that need a reaction to being observed, such as the combustibility, which needs a combustion reaction to being quantified.

When a chemical reaction occurs, and the composition of the substance change, it's a chemical change.

So, the heating copper with carbon is a chemical reaction, and purification by electrolysis is too. Color is the only physical property.

You might be interested in
All the mixture are harmful for us. is this statement true? justify with two examples​
Taya2010 [7]

Answer:

no.it is false.some are useful.like mixture of h2 and O 2 to form water.

3 0
2 years ago
Read 2 more answers
NEED HELP NOW!! Scientists study two kinds of jellyfish. One lives at the surface of the ocean; the other lives in the deep regi
bagirrra123 [75]
It’s D False. I pretty sure it’s not good enough but it’s not going there anymore lol I can’t yeyeuiiw
7 0
2 years ago
Determine the empirical formula. a 3.880g sample contains 0.691g of magnesium , 1.84 g of sulfur , and 1.365 g of oxygen .
Aliun [14]

Answer:

Mg S2 O3

Explanation:

.691 g of Mg  is .284 mole

1.84 g of S    is .5739 mole

1.365 g of O is  .8531 mole      you can see the ratio is ~  1 :2 :3

                                                        Mg S2 O3

4 0
2 years ago
Find the quantinum numbers n,m,l,s for the last of potassium layer pleasee help explain correctly all
Fantom [35]

Answer:

Quantum numbers of the outermost electron in potassium:

  • n = 4.
  • l  = 1.
  • m_l = 0.
  • Either m_s = 1/2.

Explanation:

Refer to the electron configuration of a potassium atom. The outermost electron in a ground-state potassium atom is in the 4s orbital (fourth s orbital.)

The quantum number n (the principal quantum number) specifies the main energy shell of an electron. This electron is in the fourth main energy shell (as seen in the number four in the orbital.) Hence, n = 4 for this electron.

The quantum number l (the angular momentum quantum number) specifies the shape (s, p, d, etc.) of an electron. l = 1 for s\! orbitals (such as the one that contains this electron.

Quantum numbers n and l specify the shape of an orbital. On the other hand, the magnetic quantum number m_l specifies the orientation of these orbitals in space.

However, s orbitals are spherical. Regardless of the value of n, the only possible m_l value for electrons in s\! orbitals is m_l = 0.

The spin quantum number m_s distinguishes between the two electrons in an orbital. The two possible values of m_s \! are (+1/2) and (-1/2). Typically, the first electron in an orbital is assigned an upward (\uparrow) spin, which corresponds to m_s = (+1/2).

5 0
3 years ago
Calculate the mass, in grams, of 1.2000 mol Mg₃N₂
fredd [130]
So what do you want me to do
Explanation
7 0
2 years ago
Other questions:
  • I don’t understand this, can you help me?
    8·1 answer
  • How many kilojoules of heat are released when 32.0 g of NaOH are dissolved in water? (The molar heat of solution of NaOH is –445
    10·2 answers
  • Neptunium's only naturally occurring isotope, 23793np, decays by emitting one alpha particle, one beta particle, and one gamma r
    8·1 answer
  • How many moles of air must escape from a 10-m  8.0-m  5.0-m room when the temperature is raised from 0c to 20c? assume the p
    10·1 answer
  • How much energy is released when 50.00 mol of glycerin melts? (Heat of fusion glycerin-91.7 KJ/mol)
    14·1 answer
  • what would be the total mass of the products of a reaction in which 10 grams of water decomposes into hydrogen and oxygen (and n
    14·2 answers
  • Which astronomer spent 20 years plotting the positions of the planets?
    13·1 answer
  • When a metallic element is converted to a positive ion during a chemical reaction with oxygen, the element is said to be?
    11·1 answer
  • Can someone answer 5 for me please?
    5·1 answer
  • What reasons might there be for the oil boiling slower than the other substances, besides forces between molecules?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!