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Fittoniya [83]
3 years ago
11

In which of the following sets do all species have the same number of electrons

Chemistry
2 answers:
ludmilkaskok [199]3 years ago
6 0

a)......,.............

Vladimir79 [104]3 years ago
4 0

Answer:

Option a

Explanation:

a) I^-

Atomic number of I = 53

No. of electrons = atomic number + no. of negative charge

                           = 53 + 1 = 54

Xe

Atomic number of Xe = 54

In a neutral atom, no. of electron is equal to no. of protons.

So. no. of electron in Xe = 54

a) Ba^{2+}

Atomic number of I = 56

No. of electrons = atomic number - no. of positive charge

                           = 56 - 2 = 54

All the species in the set a have 54 electrons.

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If 15.0 mL of phosphoric acid completely neutralizes 38.5 mL of 0.150 mol/L calcium hydroxide, what is the concentration of the
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Let me give it a try.

H3PO4 + Ca(OH)2 = Ca3(PO4)2 + H2O

Balancing this reaction

2H3PO4 + 3Ca(OH)2 == Ca3(PO4)2 + 6H2O.

Moles= Molarity x Volume

Volume = 38.5ml = 0.0385L

Moles of Ca hydroxide = 0.150m/L x 0.0385L

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then Simply Try The formula for Mixing of solutions

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