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
The picture represents the process that produces most of the energy used by living organisms on Earth. Which process is represen
forsale [732]
Wheres the pic i cant answer without the pic
6 0
3 years ago
Read 2 more answers
Endothermic or exothermic
yanalaym [24]

Answer:

endo takes energy in and exo releases it out

Explanation:

3 0
2 years ago
A compound with chemical formula na2cx3 has formula mass 106 amu .. what is the atomic mass of element x
maria [59]

The element "X" is "O" (oxygen).

<h3>Calculation:</h3>

Given,

Chemical formula = Na₂CX₃

Formula mass = 106 amu

Molar mass of Na = 23 amu

Molar mass of C = 12 amu

To find,

Element X =?

We will equate the equation as follows,

2(23) + 12 + 3(y) = 106

46 + 12 + 3y =106

58 + 3y = 106

3y = 106 - 58

3y = 48

y = 48/3

y = 16

We know that Oxygen has molecular mass of 16. Therefore the element "X" is "O".

Learn more about molar mass here:

brainly.com/question/22997914

#SPJ4

5 0
1 year ago
If element x forms the oxides xo and x2o3 the oxidation numbers of element x are
Deffense [45]

Answer:

b) +2 and +3.

Explanation:

Hello,

In this case, given the molecular formulas:

XO

And:

X_2O_3

We can relate the subscripts with the oxidation states by knowing that they are crossed when the compound is formed, for that reason, we notice that oxygen oxidation state should be -2 for both cases and the oxidation state of X in the first formula must be +2 since both X and O has one as their subscript as they were simplified:

X^{+2}O^{-2}

Moreover, for the second case the oxidation state of X should be +3 in order to obtain 3 as the subscript of oxygen:

X_2^{+3}O_3^{-2}

Thus, answer is b)+2 and +3

Best regards.

3 0
2 years ago
Which best explains why water is able to “stick” to the side of glass?
AveGali [126]

Explanation:

Adhesion means the ability to stick on the surface of another substance.

Water exhibits adhesive forces due to which it is able to stick to the glass.  Due to adhesive forces water spreads over the surface of glass and sticks to it.

These adhesive forces between the glass and water enough that it deforms the spherical shape of water molecules and help them stick to the surface of glass. As a result, adhesive forces overcome the repulsion between like molecules.

Hence, water is able to “stick” to the side of glass due to strong adhesive forces.


4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the second quantum number of the 3p1 electron in aluminum 1s22s22p63s23p1?
    10·2 answers
  • How to balance N2O5 +H2O ---&gt;HNO3
    11·1 answer
  • How long must you immerse equipmemt and utensils in a non-chlorine sanitizing solution
    9·1 answer
  • Pls explain ionization energy​
    12·1 answer
  • For the separation of components of a mixture, we are following different methods. What is the condition in which the process of
    8·1 answer
  • both sides in the war used military observers in hydrogen-filled balloons to watch the enemy's movements
    10·1 answer
  • Over time the Mexican-Free Tailed bat has evolved to be able to echolocate in the dark to find prey. Bats are able to see, but d
    7·1 answer
  • What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% (by mass) calcium and 44.4
    14·1 answer
  • Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess Group of ans
    7·1 answer
  • (b)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!