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kotykmax [81]
3 years ago
10

Explain the structure of an atom. Make sure to include the charges of the subatomic particles.

Chemistry
1 answer:
Ber [7]3 years ago
5 0

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus of the atom contains the protons and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged)

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Which process produces the energy that is used by solar panels?
Montano1993 [528]
A. Combustion since it can’t be nuclear….?
8 0
2 years ago
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The concentration of an HCl acid solution is initially 6mol/L. What would the concentration of a new solution be if 200 mL of th
pochemuha

Taking into account the definition of dilution, the concentration of the new solution is 1 mol/L.

<h3>Dilution</h3>

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

  • Ci: initial concentration
  • Vi: initial volume
  • Cf: final concentration
  • Vf: final volume

<h3>Final volume</h3>

In this case, you know:

  • Ci= 6 mol/L
  • Vi= 200 mL
  • Cf= ?
  • Vf= 1 L (1000 mL) water + 200 mL of HCL= 1200 mL

Replacing in the definition of dilution:

6 mol/L× 200 mL= Cf× 1200 mL

Solving:

(6 mol/L× 200 mL)÷ 1200 mL= Cf

<u><em>1 mol/L= Cf</em></u>

In summary, the concentration of the new solution is 1 mol/L.

Learn more about dilution:

brainly.com/question/6692004

brainly.com/question/16343005

brainly.com/question/24709069

#SPJ1

5 0
1 year ago
How many joules of heat must be absorbed by 500g h2O @ 50CELCIUS to convert to steam @ 120 celcius?
nadya68 [22]

Answer:

Q = 1267720 J

Explanation:

  • Qt = QH2O + ΔHv

∴ QH2O = mCpΔT

∴ m H2O = 500 g

∴ Cp H2O = 4.186 J/g°C = 4.183 E-3 KJ/g°C

∴ ΔT = 120 - 50 = 70°C

⇒ QH2O = (500 g)(4.183 E-3 KJ/g°C)(70°C) = 146.51 KJ

∴ ΔHv H2O = 40.7 KJ/mol

moles H2O:

∴ mm H2O = 18.015 g/mol

⇒ moles H2O = (500 g)(mol/18.015 g) = 27.548 mol H2O

⇒ ΔHv H2O = (40.7 KJ/mol)(27.548 mol) = 1121.21 KJ

⇒ Qt = 146.51 KJ + 1121.21 KJ = 1267.72 KJ = 1267720 J

5 0
3 years ago
Which statement is true regarding a hydrogen bond? It is weaker than dipole interaction forces. It is weaker than London dispers
Rom4ik [11]
I believe the answer is C: "<span>It occurs when a hydrogen atom bonds with electropositive atoms."</span>
4 0
3 years ago
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What was the chemical purpose of heating the MnSO4⋅H2O? Why is this procedure important?
Alla [95]

The chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.

<h3>Dehydration reactions</h3>

Dehydration reaction is a type of chemical reaction that involves the removal of water which would eventually lead to the formation of a new compound.

The molecule of MnSO4⋅H2O contains a molecule of water(H2O). After heating of the molecule, water is lost giving rise to the dry compound MnSO4.

Other examples of dehydration reactions are:

  • Reactions that produce acid anhydrides.

  • Reactions that involve the production of polymers.

  • Reaction of sucrose with concentrated sulfuric acid

Therefore, the chemical purpose of heating the MnSO4⋅H2O is to eliminate water with the formation of new compounds.

Learn more about dehydration here:

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8 0
2 years ago
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