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4 years ago

A covalent bond is formed by the following process:

Chemistry

2 answers:

stepan [7]4 years ago

7 0

A covalent bond is formed by D) Gaining or losing two or more electrons by an atom.
Hope this helps!

Alika [10]4 years ago

3 0

Answer : The correct option is, (C) sharing two electrons by two atoms

Explanation :

Covalent bond : It is defined as the bond that is formed when sharing of electrons takes place between the atoms.

This is usually formed between two non-metals.

As we know that the chlorine is a non-metal and has 7 valence electrons.

A covalent bond is formed between the two chlorine atoms by the sharing of two electron.

Ionic bond : It is defined as the bond that is formed when electron gets transferred from one atom to another atom.

This is usually formed between metal and non-metals.

As we know that the sodium is an alkali metal and has one valence electron and chlorine is a non-metal and has 7 valence electrons.

When sodium atom donates an electron to a chlorine atom then it forms an ionic compound that is sodium chloride (NaCl).

Hence, the correct option is, (C) sharing two electrons by two atoms

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How many moles of dinitrogen tetroxide (N2O4) are in 6.49 x 109 particles?

yan [13]

Answer: There are $1.08 \times 10^{-14}$ moles $N_{2}O_{4}$ present in $6.49 \times 10^9$ particles.

Explanation:

According to the mole concept, 1 mole of a substance contains $6.022 \times 10^{23}$ particles.

Hence, number of moles present in $6.49 \times 10^9$ particles are calculated as follows.

No. of moles = $\frac{6.49 \times 10^9}{6.022 \times 10^{23}}$ mol

= $1.08 \times 10^{-14}$ mol

Thus, there are $1.08 \times 10^{-14}$ moles $N_{2}O_{4}$ present in $6.49 \times 10^9$ particles.

6 0

3 years ago

Read 2 more answers

As the deapth of the ocean increases the population of ocean creatures..

Trava [24]

Answer:

( A ) Increases

Explanation:

More room, basically means more creatures. Like in a bedroom, you can only fit amount of people if its small the ocean is like that with depth.

Hopefully this makes sense???

3 0

3 years ago

Read 2 more answers

There are approximately 2 × 1022 molecules and atoms in each breath we take and the concentration of CO in the air is approximat

adoni [48]

Answer:

1.8x10¹⁷ molecules of CO are in each breath we take

Explanation:

Parts per million, ppm, is an unit of concentration in chemistry used for very diluted solutions.

<em>A 9ppm of X in a solution means in 1 million of molecules (1x10⁶) you have only 9 molecules of X.</em>

In a breath we have 2x10²² molecules and 9 ppm are CO. Thus, CO molecules in each breath are:

2x10²² molecules × (9 molecules CO / 1x10⁶ molecules) =

<h3>1.8x10¹⁷ molecules of CO are in each breath we take</h3>

6 0

3 years ago

Which is not a characteristic of a plant’s vascular tissue?

iogann1982 [59]

Answer:

It does not combine egg and sperm cells in plant.

4 0

3 years ago

Students in a chemistry class added 5 g of Zinc (Zn) to 50 g of hydrochloric acid (HCl). A chemical reaction occurred that produ

marin [14]

Answer: 11 g

Explanation:

Zn + 2HCl → ZnCl₂ + H₂

Number of moles of Zn:

Number of moles = 5 g / 65.38 g/mol

Number of moles = 0.08 mol

Number of moles of HCl :

Number of moles = 50 g / 36.5 g/mol

Number of moles = 1.4 mol

Compare the moles of both reactant with zinc chloride:

Zn : ZnCl₂

1 : 1

0.08 : 0.08

HCl : ZnCl₂

2 : 1

1.4 : 1/2×1.4 =0.7 mol

The number of moles of zinc chloride produced by Zn are less so it will limit reactants.

Mass of zinc chloride:

Mass = 0.08 mol × 136.3 g/mol

6 0

3 years ago