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Alex787 [66]
3 years ago
12

Which of the following best defines valence electrons?

Chemistry
1 answer:
Anon25 [30]3 years ago
6 0

Answer:

Electrons in the outermost energy level

Explanation:

Electrons fill up levels or rings around the nucleus of the atom. The valance electrons are the electrons on the outermost energy ring or level that is the farthest from the nucleus. Also, all electrons repel each other because they have similar charges and are both negative.

Hope this helps!  :)

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Why doesn't earth get hotter as it continues to receive radiation from the sun
Nataliya [291]
Because there is a balance between the amount of incoming radiation from the Sun and the amount of outgoing radiation from Earth.

hope this helps!
7 0
4 years ago
a chemist dissolves 0.564 moles of manganese (IV) oxide (MnO2) in water, and adds enough water to make 0.510 L of solution. Calc
ladessa [460]

Answer:

The molarity of the solution is 1.1 \frac{moles}{liter}

Explanation:

Molarity is a measure of the concentration of that substance that is defined as the number of moles of solute divided by the volume of the solution.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

molarity=\frac{number of moles of solute}{volume}

Molarity is expressed in units \frac{moles}{liter}

In this case

  • number of moles of solute= 0.564 moles
  • volume= 0.510 L

Replacing:

molarity=\frac{0.564 moles}{0.510 L}

Solving:

molarity= 1.1 \frac{moles}{liter}

<u><em>The molarity of the solution is 1.1 </em></u>\frac{moles}{liter}<u><em></em></u>

4 0
3 years ago
Why are car crashes more dangerous at higher speeds than at lower speeds
igomit [66]
The impact of speed and velocity at greater speeds affects the car much greater than at slower speeds due to impact and timing and velocity and speed.
7 0
3 years ago
Read 2 more answers
How many ml of a 0.50m solution of hno3 solution are needed to make 500 ml of 0.15m hno3
Anna71 [15]

Answer:

150.0 mL.

Explanation:

  • It is known that the no. of millimoles of HNO₃ before dilution = the no. of millimoles of HNO₃ after dilution.

∵ (MV) before dilution = (MV) after dilution.

<em>∴ V before dilution = (MV) after dilution / M before dilution</em> = (0.15 M)(500.0 mL)/(0.50 M) = <em>150.0 mL.</em>

7 0
3 years ago
Which statement describes the most likely result of a field being cleared to build homes?
Anna35 [415]

Answer:

Biodiversity will decrease.

Explanation:

The likely result of clearing the fields for building homes is that biodiversity will decrease.

Biodiversity is the variation in life forms within a particular area.

  • The balance of the ecosystem is easily tripped by the influence of human activities.
  • Some habitats are easily destroyed when new fields are cleared.
  • Habitat loss is huge problem, in the ecosystem as a result of human activities.
6 0
3 years ago
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