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Nuetrik [128]
3 years ago
14

Problem

Chemistry
1 answer:
postnew [5]3 years ago
4 0

Answer:

C) Potassium, K, and calcium, Ca

Explanation:

Given pair of elements:

Ni and Cu

Potassium and Ca

Nitrogen and oxygen

Solution:

We know that number of protons and number of electrons are always equal and number of electron or number of proton is called atomic number.

Number of protons given elements:

Ni number of protons = 28

Copper number of protons  = 29

Combine number of protons = 57

K number of protons  = 19

Ca number of protons = 20

Combine number of protons = 39

Ni number of protons  = 7

O number of protons  = 8

Combine number of protons = 15

Thus,  option C is correct.

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The quantitative amount of charge separation in a diatomic molecule contributes to the dipole moment of that molecule. A. True B
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What is the minimum volume of 5.50 M HCl necessary to neutralize completely the hydroxide in 718.0 mL of 0.183 M NaOH
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The volume of HCl required is 23.89 mL

Calculation of volume:

The reaction:

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As HCl and NaOH react in 1 : 1 ratio.

Volume of NaOH= 718 mL

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Using the dilution formula:

M_1\times V_1(NaOH)= M_2\times V_2(HCl)

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Volume of HCl required will be 23.89 mL.

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brainly.com/question/1822651

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which statement best describes a mole? it is 12 units of a given substance. it contains 6.02 1023 grams of sodium chloride. it i
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The General Conference on Weights and Measures defines the mole as the amount of a substance that contains 6.02214076 × 10²³ units of entities

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