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3 years ago

How many dots belong in the electron dot diagram of a boron (B) atom?

Chemistry

2 answers:

Contact [7]3 years ago

8 0

There are three dots in a boron atom.

Pachacha [2.7K]3 years ago

5 0

Answer:

There are three dots in the Lewis dot diagram of boron atom.

Explanation:

Boron is a chemical element that belongs to the group 13 and period 2 of the periodic table. It is a p-block element having atomic number 5.

The ground state electronic configuration of boron is 1s² 2s² 2p¹. So, in the ground state, the boron atom has 3 valence electrons in the valence shell.

The Lewis dot structure represents the number of valence electrons of an atom by dots.

Therefore, there are three dots in the Lewis dot diagram of boron atom.

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What is the molarity of a solution which contains 0.80 mol of HCl in 250mL of solution?

mariarad [96]

Answer:

3.2M HCl Solution

Explanation:

Molarity = moles of solute / volume of solution expressed in liters

moles of solute = 0.80 moles HCl

volume of solution = 250 ml = 0.250 Liter

Molarity (M) = 0.80 moles HCl / 0.250 Liters = 3.2M HCl Solution

6 0

3 years ago

( plsssss , all I need is 3 substances ) Substances that make up niobium ?

qaws [65]

Answer:

niobium and tantalum, oxide and manganese

Explanation:

Both niobium and tantalum are found together in the mineral columbite, a mixed oxide that also contains iron and manganese, and they have similar chemical and physical properties. In fact Niobium was originally named columbium after Columbia, because of its discovery in a mineral sent from America in 1801

3 0

3 years ago

A student added 5 grams of calcium chloride, a white solid substance, to 15 grams of water at 220 C. Several observations were m

umka21 [38]

Answer:

Explanation:

A The calcium chloride dissolves in solution

B The mass of the solution totals 20 g

C The temperature of the solution is 35 degrees

D The solution became lighter in color

The correct answer would be that the solution became lighter in color.

An increase in temperature can also be considered a sign of a chemical reaction but in this case, the dissolution of calcium chloride in water is in itself exothermic.

A change in the mass of the final solution could also be considered a sign of a chemical reaction but in this case, the total mass equals the addition of the individual masses of the reactant.

The dissolution of calcium chloride in water is not enough as evidence of a chemical reaction. Dissolution can be a physical change of which, the evaporation of the water would retrieve the solute.

A change in color, however, is one of the evidence to establish that a chemical reaction has occurred.

The correct option is D.

4 0

3 years ago

The first step in the formation of all three products is the loss of the ots leaving group to give a carbocation intermediate. t

lina2011 [118]

The carbocation stabilized by resonance structure and thereby lowers the energy of the carbocation, hydrogen will add to the carbon in the double bond that produces delocalization of electrons.

<h3>What is carbocation?</h3>

A carbocation is a molecule in which a carbon atom has a positive charge and three bonds.

In general, electrons are stabilized by delocalization. The stabilization energy engendered by delocalization over more than two atoms is called the resonance stabilization energy or simply the resonance energy. The greater the extent of electron delocalization the greater the resonance stabilization.

Learn more about the carbocation here:

brainly.com/question/19168427

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