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3 years ago

Is the awnser a b c or d ?

Chemistry

2 answers:

12345 [234]3 years ago

3 0

Number of valence electrons

Ksivusya [100]3 years ago

3 0

Answer:

It would be: C

Explanation:

"<em>The elements [on the periodic table] in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. </em><em>They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its outer shell.</em>"

I hope this helps! Have a nice night! :D

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Answer:

increase

Explanation:

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4 years ago

Calculate the molarity of a 10.0% (by mass) aqueous solution of hydrochloric acid.

olga2289 [7]

The question is incomplete,the complete question :

Calculate the molality of a 10.0% (by mass) aqueous solution of hydrochloric acid:

a) 0.274 m

b) 2.74 m

c) 3.05 m

d) 4.33 m

e) the density of the solution is needed to solve the problem

Answer:

The molality of a 10.0% (by mass) aqueous solution of hydrochloric acid is 3.05 mol/kg.

Explanation:

10.0% (by mass) aqueous solution of hydrochloric acid.

10 grams of HCl is present in 100 g of solution.

Mass of HCl = 10 g

Mass of solution = 100 g

Mass of solution = Mass of solute + Mass of water

Mass of water = 100 g - 10 g = 90 g

Moles of HCl = $\frac{10 g}{36.5 g/mol}=0.2740 mol$

Mass of water in kilograms = 0.090 kg

Molality = $\frac{0.2740 mol}{0.090 kg}=3.05 mol/kg$

The molality of a 10.0% (by mass) aqueous solution of hydrochloric acid is 3.05 mol/kg.

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3 years ago

What is the difference between covalent bonding and electrovalent bonding

Rudiy27

Answer:

1 ) Electrovalent compounds are formed by the complete transfer of electrons while covalent compounds are formed by sharing of electrons between 2 atoms.

2) Electrovalent compounds are more soluble in polar solvents like water while covalent compounds are more soluble in non-polar solvents like methane.

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Answer:

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