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
Katarina [22]
2 years ago
11

How could you tell if a substance has undergone a physical change or a chemical one?

Chemistry
1 answer:
marusya05 [52]2 years ago
6 0

Answer: Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.

A physical change is are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.

You might be interested in
1. How much taller is the average person today than the average person 100 years ago?
andreev551 [17]
5 inches I am not sure but I THINK it’s 5 inches sry if I’m wrong
4 0
3 years ago
Which element is oxidized in the reaction below? fe(co)5 (l) + 2hi (g) fe(co)4i2 (s) + co (g) + h2 (g)?
DanielleElmas [232]
Oxidation state of I is (-1) and for CO it is zero. Let's assume that the oxidation state of Fe in Fe(CO)₄I₂<span> (s) is x. For whole compound, the charge is zero.

Sum of oxidation numbers in all elements = Charge of the compound.

Here we have 1Fe , 4CO and 2I
hence we can find the oxidation state as;
 x + 4*0 + 2*(-1) = 0
 x + 0 - 2            = 0
                   x     = +2
Hence the oxidation state of Fe in product </span>Fe(CO)₄I₂ (s) is +2.

Same as we can find the oxidation state (y) of Fe in Fe(CO)₅(s).
y + 5*0 = 0
   y        = 0

Since oxidation state of Fe increased from 0 to +2, the oxidized element is Fe in the given reaction.
5 0
3 years ago
Among animals, what is one major advantage of sexual reproduction compared to asexual reproduction?
zimovet [89]
D: they have new dna combinations
5 0
3 years ago
what mass of carbon dioxide will be produced when 12.9 g of butane reacts with an excess of oxygen in the following reaction?
Nadya [2.5K]
39.1 gCO2
I think if that’s an option
3 0
3 years ago
Which body systems are responsible to transport materials around and out of the body?
Anni [7]

Answer:

Circulatory System

Explanation:

6 0
2 years ago
Other questions:
  • What happens when carbon dioxide is passed through lime water for a long time? write with equation​
    11·1 answer
  • Answer ASAP 50 pts
    9·2 answers
  • How many fluoride ion (F-1) are needed to balance a lead (IV) ion (Pb+4)?
    11·2 answers
  • In which list are the elements arranged in order of increasing atomic mass?
    8·1 answer
  • Hydrogen peroxide decomposes spontaneously to yield water and oxygen gas according to the following reaction equation. 2H202(aq)
    5·1 answer
  • According to de Broglie, which of these objects does not have a wavelength?
    9·1 answer
  • 1.40 m3 is how many mL
    9·2 answers
  • Calculate the relative rate of effusion for the orange to blue spheres. The root-mean-square speed for the orange spheres is 565
    10·2 answers
  • Are light and other forms of energy are made of atoms
    8·2 answers
  • 0.965g of iodine was shaken with a mixture of 50cm3 trichloromethane and 50cm3 of water in the separating funnel until equilibri
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!