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
DENIUS [597]
3 years ago
8

a substance may change from one form to another with change in temperature. these are _______ changes

Chemistry
1 answer:
RoseWind [281]3 years ago
6 0

Answer:

Physical changes

As we know,

Physical changes are those changes which can be reversed and is not permanent. It does not change the chemical nature of the substance....A great example of physical change is given in the question itself, When a substance is melted it can be frozen or cooled back to it's original form, When an object is frozen it can be melted back to its Liquid form, and when an object is in gaseous form like water vapour it can be cooled, and brought back to liquid form....

Happy to help

Pls Mark As Brainliest.

You might be interested in
What's meant by the term enantiotropy?​
Mila [183]

Answer:

the relation of two different forms of the same substance (such as two allotropic forms of tin) that have a definite transition point and can therefore change reversibly each into the other — compare monotropy.

7 0
3 years ago
Read 2 more answers
What is the study of nature and the physical world using the scientific method
Gala2k [10]
Really? Really!? IT'S SCIENCE!
5 0
3 years ago
The following equation represents the type of reaction called
Eva8 [605]

Answer: C REDUCTION

Explanation:

Guessed after knowing oxidation isn't the answer. Got right

7 0
3 years ago
Write the chemical equations for the neutralization reactions that occurred when hcl and naoh were added to the buffer solution.
irga5000 [103]
A base and an Acid always react to form a salt and water

So, HCl + NaOH —> NaCl + HOH
5 0
3 years ago
An aqueous solution of glucose has molality of 6.81 and a density of 1.2 g/ml what is the molarity of glucose in the solution
andriy [413]

Answer:

the molarity is 3.68 moles/L

Explanation:

the molality of the solution of sucrose is

m= moles of glucose / Kg of solvent (water)= 6.81 ,

since the molecular weight of glucose is 180.156 gr/mole , then per each kilogram of solvent there is

6.81 moles*180.156 gr/mole + 1000 gr of water = 2226.86 gr of solution

from the density

volume of solution = mass of solution/density = 2286.86 gr / 1.2 gr/ml = 1855.71 ml

therefore there is 1000 gr of water in 1855.71 ml

then the molarity M is

M= moles of glucose / L of solution = (moles of glucose /  Kg of solvent) *  (Kg of solvent/L of solution) = 6.81 moles/Kg * 1Kg/1.85 L = 3.68 moles/L

M= 3.68 moles/L

Note:

- Would be wrong in this case to assume density of water = 1 Kg/L since the solution is heavily concentrated in glucose and therefore the density of water deviates from its pure value.

3 0
3 years ago
Other questions:
  • How many liters are equivalent to 645 mililiters
    9·2 answers
  • Generally, most water reabsorption in a nephron occurs at the:_________
    13·1 answer
  • As shown in the image above, the Earth's outermost layer is divided into several tectonic plates. Which of the following is true
    8·1 answer
  • On a shade-grown coffee plantation, smaller coffee plants grow in the shade of forest trees. The practice produces fewer coffee
    14·2 answers
  • Let this be an easy 5 points for your brainly account all is ask for in return is a "thank you"
    11·1 answer
  • λmax for the π → π* transition in ethylene is 170 nm. Is the HOMO-LUMO energy difference in ethylene greater than or less than t
    12·1 answer
  • I need help with Number 63
    14·1 answer
  • Q3. A new pill (Wardine) has been created that reduces the side effects of the common cold! The
    12·1 answer
  • If you are given time and distance, you can determine power if you know
    11·1 answer
  • A.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!