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
Andre45 [30]
3 years ago
13

Consider the following properties: I) The red color of rubies is due to the presence of chromium ions. II) Objects made of silve

r become tarnished. III) The boiling point of ethanol is 78◦C. Which is/are chemical?
Chemistry
1 answer:
quester [9]3 years ago
5 0

Answer:

II) Objects made of silver become tarnished.

Explanation:

Physical properties are the properties which can be observed without changing identity of substance.

Chemical properties are the properties which describe how the substance changes into the different substance completely.

Boiling is an example of physical change in state of the substance. Color is also an example of physical property like boiling point and hence these are constants. The reason of the color is that the chromium ions shows certain colors as the electrons are excited due to absorption of the light. The tarnishing of the silver is an example of the chemical change which occurs due to the reaction of the silver with oxygen. This is also known as corrosion.

You might be interested in
Draw a chair conformation for cis-1-bromo-2,4-dimethylcyclohexane showing equatorial and axial positions at the carbon atoms bea
Ahat [919]

Answer:

See attachment.

Explanation:

Mono-substituted cyclohexanes are more stable with their substituents in an equatorial position. However, with poly-substituted cyclohexanes, the situation is more complex since the steric effects of all substituents have to be taken into account. In this case, you can see that <u>the interconversion is shifted towards the conformation in the bottom because there is less tension between the substituents</u>.

6 0
3 years ago
How does the composition of water molecule affect its charge
kolezko [41]
It is make the molecule polar.
7 0
3 years ago
Read 2 more answers
Explain it to you or more sentences using your own words what you learned about biomes organisms and populations
andrezito [222]
A biome is a large area characterized by its vegetation, soil, climate, and wildlife. ... Marine biomes cover close to three-quarters of Earth's surface. Marine biomes include the ocean, coral reefs, and estuaries. Grasslands are open regions that are dominated by grass and have a warm, dry climate.
5 0
2 years ago
Sulfur dioxide gas reacts with oxygen gas for form sulfur trioxide gas. the equilibrium constant for the reaction at 6000c is 4.
Art [367]
When the balanced equation for this reaction is:

            2SO3 → 2SO2 + O2 so, by using ICE table:

initial    0.391              0          0.125m

change  -X               +2X           +X

Equ     (0.391-X)         2X           0.125+X

when Keq = concentration of products / concentration of reactants

so, by substitution

    4.34  = [2X]^2 * [0.125+X] / [0.391-X]^2  by solving for X

∴ X = 0.357 m 

∴ the concentration of SO2 = 2x = 2 * 0.357 

                                               = 0.714 m 
3 0
3 years ago
is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of
kogti [31]

Yes. The two elements can combine to form different compounds.

<h3>Explanation</h3>

Two elements can combine at different ratios.

Consider CO and CO₂. Both are made from carbon and oxygen. However, C and O combine at a 1:1 ratio in CO but at a 1:2 ratio in CO₂. CO is a fuel; it burns in the air. CO₂ does not burn in the air; it is used to put out fires and is found in extinguishers. CO and CO₂ are two distinct compounds.

There are many ways for the elements to combine with each other. As a result, the first twenty elements on the periodic table alone can produce a large number of compounds.


6 0
3 years ago
Other questions:
  • Which group of extremophiles does thermus aquaticus belong to
    6·2 answers
  • Why is a solution not a pure substance?
    9·1 answer
  • Why is a molecule of CO2 nonpolar even though the bonds between the carbon atom and the oxygen atoms are polar?
    15·1 answer
  • A natural disaster caused an ecosystem to experience a significant drop in species richness. What can you conclude about the eco
    9·2 answers
  • which mineral group is composed of compounds that contain atoms of sulfur and one or more metals.......HELP MEEEE!!!!​
    5·2 answers
  • Which situation is the best example of interia
    13·1 answer
  • In a chemical formula such as C6H12O6 and H2O, what do you call the little numbers below the normal line of text.
    8·2 answers
  • Is frying an egg chemical or physical change
    12·2 answers
  • What is the definition of atomic group
    5·1 answer
  • What coefficient would balance the following equation ch4+_O2--&gt; CO2+2H2O
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!