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Aleks04 [339]
3 years ago
9

Precautions to be taken when is experimenting the boiling point of liquids

Chemistry
1 answer:
Genrish500 [490]3 years ago
7 0
Wear heat protective clothing and goggles
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What would be the final volume (in mL) of the aqueous potassium fluoride which was prepared by dissolving 8.0 g of potassium flu
zhuklara [117]

Answer:

0.15 L

Explanation:

Step 1. Calculate the <em>moles of KF.</em>

Molar mass = 58.10 g/mol

Moles of KF = 8.0 × 1/58.10  

Moles of KF = 0.138 mol KF

===============

Step 2. Calculate the <em>volume of KF </em>

c = n/V                  Multiply both sides by V

V = 0.138 × 1/0.89  

V = 0.15 L



5 0
3 years ago
A bicycle pump contains 250 mL of air at a pressure of 102 kPa. If the pump is
CaHeK987 [17]

Considering the Boyle's law, the new volume becomes 1,148,344.444 mL or 1148.34 L.

<h3>Boyle's law</h3>

Boyle's law relates pressure and volume, stating that the volume occupied by a given mass of gas at constant temperature is inversely proportional to pressure. This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

P×V=k

Now it is possible to assume that you have a certain volume of gas V1 which is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and the following is true:

P1×V1=P2×V2

<h3>New volume</h3>

In this case, you know:

  • P1= 102 kPa= 10335.1 atm (being 1 kPa= 101.325 atm)
  • V1= 250 mL
  • P2= 2.25 atm
  • V2= ?

Replacing in the Boyle's law:

10335.1 atm ×250 mL= 2.25 atm×V2

Solving:

(10335.1 atm ×250 mL)÷ 2.25 atm= V2

<u><em>1,148,344.444 mL= 1148.34 L=  V2</em></u>

Finally, the new volume becomes 1,148,344.444 mL or 1148.34 L.

Learn more about Boyle's law:

brainly.com/question/4147359

#SPJ1

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2 years ago
Explain how the quantum mechanical model of the atom describes the electron structure of an atom
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Electrons<span> are NOT in circular orbits around nucleus. -The</span>atomic<span> orbital </span>describes<span> the probable location of the electrion </span>Quantum Mechanical Model of the Atom<span> Page 3 There are different kinds of </span>atomic orbitals<span> that differ in the amount of energy and shapes (where the </span>electron<span> probably is).

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4 years ago
A total mechanical energy of an object is calculated as
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<span>A total mechanical energy of an object is calculated as the sum of kinetic energy and potential energy</span>
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WILL MARK BRAINLIST FOR BEST ANSWER!!! <br> What things can cause extinction of a species?
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Pollution, destruction of there habitat, a new species, population growth, etc.
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