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
sweet [91]
2 years ago
5

Compare the type of change that occurs when an iron bar rusts and when a substance freezes.

Chemistry
1 answer:
Ivanshal [37]2 years ago
5 0

Explanation:

when an iron bar rust is an example of a chemical change in which a new substance is formed and the change is not easily reversible.for iron to rust moisture and air must be present.while when a substance freezes,it can be easily reversed through melting and no new substance is formed.this change is termed a physical change.

You might be interested in
Which would be the best way to represent the concentration of a 1. 75 M K2CrO4 solution? 1. 75% K2CrO4 [K2CrO4] (K2CrO4) K2CrO4,
tekilochka [14]

The amount of the solute present in the given solution is called the concentration. The best way to represent the concentration of the solution is \rm [K_{2}CrO_{4}].

<h3>What is molar concentration?</h3>

Molar concentration is the molarity of the solution that is the measure of the concentration of the solute dissolved in the solution.

The formula for calculating molar concentration is given as,

\rm Molarity = \dfrac{\text{moles of solute}}{\text{Solution in L}}

The concentration of any substance is represented in the square bracket like \rm [X] or  \rm [K_{2}CrO_{4}].

Therefore, option B. \rm [K_{2}CrO_{4}] is the representation of the concentration.

Learn more about the molarity here:

brainly.com/question/1532164

8 0
2 years ago
Zn + 2HCl ---&gt; ZnCl2 + H2 1. Is the equation above balanced or unbalanced? How do you know? (Hint: How many atoms of each typ
Arisa [49]

Answer:Balance. Acid+metal->salt+hydrogen.1 molecule od zinc contains 1 zinc atom.2 molecule of HCl contains 2 atoms hydrogen and 2 chlorine.1 molecule of Zncl2 contain one atom of zinc and two atom of chlorine.And two 2 atoms of hydrogen.

Explanation:

5 0
3 years ago
Please i need help really quickly on this. thank you​
prohojiy [21]

Answer:

the error could have been the fact that the unit for volume wasn't changed from cm³ to dm³

hence the calculation error

the solution to this would be first dividing the volume by 1000 to get that same amount in dm³ which is the standard unit to be used for volume-density calculations

6 0
3 years ago
Amount of liquid measured in L or Lm
devlian [24]

The amount of liquid is measured in L. As the unit Lm is only used when measuring the mass liquid fraction.


5 0
3 years ago
What structural feature is indicated by the suffix -ene in the name of a hydrocarbon
vaieri [72.5K]

Answer:

A double bond between carbon atoms

Explanation:

The suffix -ene is used for alkenes, which tells you that the molecule has a carbon-carbon double bond.

7 0
3 years ago
Other questions:
  • Five different substances are given to you to be dissolved in water. Which substances are most likely to undergo dissolution in
    13·1 answer
  • WILL MARK BRAINLIEST AND THANK YOU!! PLEASE HELP!!!
    11·1 answer
  • How many significant figures are present in 2.020 x 10-25
    13·1 answer
  • What forces makes a fan stop spinning?
    9·2 answers
  • BF3 type of compound
    15·1 answer
  • Please i need help ​
    11·1 answer
  • What type of symbolic relationship do a bat and cow have ?
    9·1 answer
  • 6CO2 + 6H20 → C,H120, + 602
    12·1 answer
  • Marcar la alternativa correcta en relación a desplazamiento y la distancia
    11·1 answer
  • Would you rather be hot or cold
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!