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
MrMuchimi
4 years ago
9

A calorimeter contains 251 g of water at 24.3 C.The temperature of the water decreases to 18.5 C when 12.5 g of potassium nitrat

e is dissolved in water. Is dissolving potassium nitrate in water endothermic or exothermic
Chemistry
1 answer:
vova2212 [387]4 years ago
8 0

Answer:

Endothermic  

Explanation:

The temperature of the water decreased.

The water lost heat.

The heat must have gone into getting the KNO₃ into solution.

So, the dissolving of KNO₃ in water is endothermic.

You might be interested in
Which term is de ned as the region in an atom where an electron is most likely to be located?
charle [14.2K]
Orbital
All atoms have the same number of electrons as protons. Negative electrons are attracted to the positive nucleus. This force of attraction keeps electrons constantly moving around the nucleus. The region where an electron is most likely to be found is called an orbital.
Here you go :)
4 0
3 years ago
Which set of numbers gives the correct possible values of l for n = 2
Paha777 [63]
HEY THERE!!

For a given principal quantum number or n, the corresponding angular quantum number or l is equivalent to a range between 0 and (n-1) .

This means that the angular quantum number for a principal quantum number of 2 is equivalent to:

l = 0 -> (n-1) = 0 -> (2-1) = 0 -> 1

So the answer is 0, 1

HOPE IT HELPED YOU.
3 0
3 years ago
Read 2 more answers
Calculated from measurements of distance and time defined
prisoha [69]

Answer:

Any of the six chemical elements that markup group1

of the periodic table.

Explanation:

8 0
3 years ago
What is the molecular geometry of PBr3? A. trigonal pyramidal B. trigonal planar C. linear D....
lubasha [3.4K]
The correct answer is:

TRIGONAL PYRAMIDAL
4 0
3 years ago
At a room temperature, which of the following will evaporate first, a drop of water or a drop of ethanol
Angelina_Jolie [31]

Ethanol will evaporate first because it is more volatile or has a lower boiling point than water.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Two chemicals switch places is called
    5·2 answers
  • Does the law of conservation of mass apply to physical changes or just chemical changes?
    7·1 answer
  • Potential energy that is related to an object's height above the ground is known as ________ potential energy. A. chemical B. el
    7·2 answers
  • A student is heating a chemical in a beaker with a Bunsen burner.
    12·2 answers
  • During a chemical reaction, the amount of energy
    6·1 answer
  • A flash contains 85.6g of C7H5NO3S (Saccharine) in 2.00 litre of a solution. What is the molarity?
    13·1 answer
  • Calcium is a metal.
    12·1 answer
  • Accidentally sent a message! never mind
    12·1 answer
  • Why does D2O <br>have a higher boiling point than H2O ​
    12·2 answers
  • Given the balanced equation representing a
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!