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solmaris [256]
3 years ago
10

Electronic configuration for Cr, Cu, Cr+2, Cu+2, Mn+2

Chemistry
2 answers:
Zanzabum3 years ago
8 0
Chromium (Cr): 2, 8, 8, 6
Copper (Cu): 2, 8, 8, 11
Chromium+2 (Cr+2): 2, 8, 8, 4 (if the ion retains a positive charge then the amount of electrons will decrease)
Copper+2 (Cu+2): 2, 8, 8, 9
Manganese+2 (Mn+2): 2, 8, 8, 5
Brums [2.3K]3 years ago
4 0
The electron configuration for the following elements and ions:
Cr 2-8-13-1
Cu 2-8-18-1
Cr+2 2-8-12
Cu+2 2-8-17
Mn+2 2-8-13

a positive sign next to an atom indicates that it lost electrons.
a negative sign indicates that it gained electrons
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2 years ago
What is the molarity of a solution in which 0.732 moles of hcl are dissolved in 0.975 liters of solution?
posledela
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6 0
3 years ago
The enthalpy of a pure liquid at 75oC is 100 J/mol. The enthalpy of the pure vapor of that substance at 75oC is 1000 J/mol. What
pentagon [3]

Answer:

900 J/mol

Explanation:

Data provided:

Enthalpy of the pure liquid at 75° C = 100 J/mol

Enthalpy of the pure vapor at 75° C = 1000 J/mol

Now,

the heat of vaporization is the the change in enthalpy from the liquid state to the vapor stage.

Thus, mathematically,

The heat of vaporization at 75° C

=  Enthalpy of the pure vapor at 75° C - Enthalpy of the pure liquid at 75° C

on substituting the values, we get

The heat of vaporization at 75° C = 1000 J/mol - 100 J/mol

or

The heat of vaporization at 75° C = 900 J/mol

8 0
3 years ago
What does potassium hydroxide and sulphuric acid make?
bekas [8.4K]

Base + Acid = Water + Salt

It makes salt water... water and potassium sulfate

Balanced rxn is:

2KOH + H2SO4 = 2H2O + KSO4



4 0
3 years ago
Read 2 more answers
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