All categories

2 years ago

In a Lewis structure, why must pairs of unshared of lone pairs if dots be placed around the outside of some of the atoms

Chemistry

1 answer:

Maksim231197 [3]2 years ago

6 0

Answer:

In a Lewis symbol, the symbol for the element is used to represent the atom and its core electrons. Dots placed around the atom are used to indicate the valence electrons. ... In 1916, Gilbert Newton Lewis, an American chemist, suggested that molecules were formed when atoms shared pairs of outer electrons.

Explanation:

You might be interested in

Is facilitated diffusion passive or active transport?

bazaltina [42]

Answer:

Its passive

Explanation:

Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins.

6 0

2 years ago

0.25 mol of nitric acid is used to make a 0.10 M nitric acid solution. How many grams of solute was used?

Yanka [14]

Answer:

15.75 grams of HNO3 was used and dissolved in 2.5 liters of solvent, to make a 0.10 M solution

Explanation:

Step 1: Data given

Nitric acid = HNO3

Molar mass of H = 1.01 g/mol

Molar mass of N = 14.0 g/mol

Molar mass O = 16.0 g/mol

Number of moles nitric acid (HNO3) = 0.25 moles

Molairty = 0.10 M

Step 2: Calculate molar mass of nitric acid

Molar mass HNO3 = Molar mass H + molar mass N + molar mass (3*O)

Molar mass HNO3 = 1.01 + 14.0 + 3*16.0

Molar mass HNO3 = 63.01 g/mol

Step 3: Calculate mass of solute use

Mass HNO3 = moles HNO3 * molar mass HNO3

Mass HNO3 = 0.25 moles * 63.01 g/mol

Mass HNO3 = 15.75 grams

15.75 grams of HNO3 was used and dissolved in 2.5 liters of solvent, to make a 0.10 M solution

7 0

3 years ago

Select all that apply.

cupoosta [38]

Answer:

B and C

Explanation:

I think the answer correct is C because you never know in what temperature the block of ice is going to melt but if it says select all that apply its possible that B might be useful.

7 0

2 years ago

What is aluminum is chemistry

spayn [35]

Answer:

Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and ductile metal in the boron group. ... Aluminium is remarkable for its low density and its ability to resist corrosion through the phenomenon of passivation.

Explanation:

i did aluminum chemistry

5 0

3 years ago

Which of the following is a correct balanced equation for the neutralization reaction that occurs

PtichkaEL [24]

Neutralization reaction takes place between an acid and a base to form salt and water.

In the given reaction the acid is hydrochloric acid HCl and the base is aluminum hydroxide (Al(OH) $_{3}$ ).

The correct balanced equation for the neutralization reaction that occurs between aluminum hydroxide and hydrochloric acid can be represented as:

$Al(OH)_{3}(aq)+ 3HCl(aq) --->AlCl_{3}(aq)+3H_{2}O(l)$

Al(OH) $_{3}$ can give 3 hydroxide, $OH^{-}$ ions which can neutralize the 3 $H^{+}$ ion produced by 3 HCl molecules giving 3 mole of water and the salt aluminum chloride, AlCl $_{3}$ .

Therefore the correct option will be.

D. Al(OH)3 + 3 HCl (aq) --> AlCl3(aq) + 3 H2O(l)

3 0

3 years ago