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3 years ago

Draw the Lewis Structure for H2O.

Chemistry

1 answer:

GalinKa [24]3 years ago

3 0

Answer:

Structure has been shown below

Explanation:

In a Lewis structure, least electronegative atom is taken as central atom (except H)
Total valence electrons of constituting atoms are used to construct Lewis structure
A bond between two atoms are represented by a horizontal line or a dotted line (two dots).
Spatial rearrangement of atoms are neglected in Lewis structure.
H has one valence electron and O has six valence electrons. So, total valence electrons in $H_{2}O$ are 8
Lewis structure of $H_{2}O$ has been given below.

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Why do surfers put wax on their boards

poizon [28]

Answer:

to keep the surfer from slipping off the board

Explanation:

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3 years ago

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Which statement describes thermal energy?

Alona [7]

Answer: Option (d) is the correct answer.

Explanation:

Thermal energy is defined as the internal energy of an object because of the kinetic energy present within the molecules of the object.

So, when thermal energy is added to an object then kinetic energy within its molecules will also increase. As a result, temperature of the object will also increase due to increase in number of collisions between the molecules.

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3 years ago

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Why does burning coal produce more heat energy than burning paper

Vlad1618 [11]

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4 years ago

Assuming all the NH3 dissolves and that the volume of the solution remains at 0.450 L , calculate the pH of the resulting soluti

Yanka [14]

Answer:

8.9357.

Explanation:

So, let us dive right into the solution to the above problem;

We have that the volume of the solution = 0.450 L.

The first thing to do is to determine the number of moles by using the formula below:

Pressure × volume = number of moles × gas constant × temperature.

Therefore, making the number of moles the subject of the formula we have;

Number of moles = (pressure × volume)/ has constant × temperature.

Number of moles of NH3=( 735 × 7.50 )/ 62.4 × 295 = 0.2995 moles.

The number of moles of HCl =

0.450 × 0.450 = 0.2025 moles.

Molarity of HCl = 0.2025 moles/ 0.450 L = 0.45M.

The molarity of {OH^-} = (0.2995 moles - 0.2025 moles) /0.450 = 0.097/0.450 = 0.2156 M.

Therefore, kb = 1.8 × 10^-5 = [ 0.450] [OH^-] / [ 0.2156 M] = 0.000008624.

[OH^-] = 0.000008624.

Hence, pOH = 5.0643.

pH = 14 - 5.0643 = 8.9357.

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3 years ago

What state of matter is best represented by the diagram below?

nalin [4]

Answer:

Gas

Explanation:

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4 years ago