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
mojhsa [17]
4 years ago
9

Is dissolving a solid a physical or chemical change

Chemistry
1 answer:
Mrac [35]4 years ago
7 0

Dissolving a solid in liquid is a physical change . For eg table salt in water is a physical change because only the state of the matter has changed. Allowing the water to evaporate will return the salt to a solid state. Thus, dissolving a solid is a physical change.

You might be interested in
HELP! Question 11.
xxMikexx [17]

Answer:

Warm front Forms when a moist, warm air mass slides up and over a cold air mass. As the warm air mass rises, it condenses into a broad area of clouds. A warm front brings gentle rain or light snow, followed by warmer, milder weather.

Your answer is B.

Enjoy.

6 0
4 years ago
What is ΔE in kJ for a system that receives 1.79 kJ of heat from surroundings and has 4.51 kcal of work done on it at the same t
kenny6666 [7]

Answer: 20.7 kJ

Explanation:

According to first law of thermodynamics:

\Delta E=q+w

\Delta E=Change in internal energy

q = heat absorbed or released

w = work done or by the system

w = work done on the system=-P\Delta V  {Work is done on the system is positive as the final volume is lesser than initial volume}

w = 4.51 kcal = 4.51\times 4.184kJ=18.9kJ    (1kcal = 4.184kJ)

q = +1.79 kJ   {Heat absorbed by the system is positive}

\Delta E=+1.79+(18.9)=20.7kJ

Thus \Delta E for a system that receives 1.79 kJ of heat from surroundings and has 4.51 kcal of work done on it at the same time is 20.7 kJ

4 0
3 years ago
Which has a higher kinetic energy an object at 20° C or an object at 50°C
Simora [160]

Answer:

The object at 50°C will have a higher kinetic energy.

Explanation:

Temperature is a measure of the average kinetic energy of the particles in an object. As you introduce more energy into the system (e.g. heat the object), the particles on average move faster because they have more kinetic energy.

5 0
3 years ago
What is the oh of a solution with a ph of 9.8
Veseljchak [2.6K]
It would be 4.2, hope this helps.
4 0
3 years ago
Fe(NO3)2 not sure how to get the oxidation numbers of all elements
Shtirlitz [24]
You must remember that oxidation number of hydrogen in acids is always +1, oxidation number of oxygen in oxides & acids is always -2... metals has always oxidation number on plus!

group NO3 comes from HNO3...and oxidation number of whole acid group is always on minus and equal to the amount of hydrogen atoms in this acid... so oxidation number of NO3 = -1

we have 2 NO3 groups so 2*(-1) = -2 and that is the reason why oxidation number of Fe in this formula must be +2... because sum of all elements always gives 0!

Now we could count of oxidation number for nitrogen... we write HNO3 and start counting from right to left:
3*(-2) from oxygens + 1 from hydrogen = -5
so nitrogen must have +5 oxidation number... because sum all in formula must be 0.


4 0
3 years ago
Other questions:
  • Significant digits are the number of digits that reflect the precision of a measurement or number. true or false
    14·1 answer
  • Which of the following is a molecule but
    6·1 answer
  • In each pair of statements, choose the example that is more reliable.
    15·2 answers
  • Sodium chloride (NaCl) is the chemical name for table salt and potassium chloride (KCl) is a common salt substitute. Using the p
    11·1 answer
  • Which statement is false? a) When reactants become products, they do so through an intermediate transition state. b) At equilibr
    5·1 answer
  • You have 8 red M&Ms, 6 brown M&Ms, 4 yellow M&Ms, and 3 green M&Ms.
    11·1 answer
  • By how many times would you expect Al2(SO4)3 to depress the F.P of water compared to sucrose C12H22011 ?​
    11·1 answer
  • Polonium has a large, unstable nucleus. through which process is it most likely to become stable?
    15·1 answer
  • How do chemists model the valence electrons of metal atoms
    10·1 answer
  • What is observed when magnesium is reacted with hydrochloric acid? choose all that apply
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!