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german
3 years ago
13

What is 80 minus 20%​

Chemistry
2 answers:
Dvinal [7]3 years ago
7 0
79.8 ___________________\__\_
LekaFEV [45]3 years ago
3 0

Answer:

Explanation:

20% = 20/100 = 0.2

80 - 20%

= 80 - 0.2

= 79.8

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.400 moles of CO2 gas are confined in a 5.00-liter container at 25 °C. Calculate the pressure exerted in atmospheres and mm Hg.
solong [7]

The pressure exerted by 0.400 moles of carbon dioxide in a 5.00 Liter container at 25 °C would be 1.9563 atm or  1486.788 mm Hg.

<h3>The ideal gas law</h3>

According to the ideal gas law, the product of the pressure and volume of a gas is a constant.

This can be mathematically expressed as:

pv = nRT

Where:

p = pressure of the gas

v = volume

n = number of moles

R = Rydberg constant (0.08206 L•atm•mol-1K)

T = temperature.

In this case:

p is what we are looking for.

v = 5.00 L

n = 0.400 moles

T = 25 + 273

 = 298 K

Now, let's make p the subject of the formula of the equation.

p = nRT/v

  = 0.400 x 0.08206 x 298/5

  = 1.9563 atm

Recall that: 1 atm = 760 mm Hg

Thus:

1.9563 atm = 1.9563 x 760 mm Hg

                   = 1486.788 mm Hg

In other words, the pressure exerted by the gas in atm is 1.9563 atm and in mm HG is 1486.788 mm Hg.

More on the ideal gas law can be found here: brainly.com/question/28257995

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8 0
1 year ago
An ion is formed when an atom___?
KATRIN_1 [288]

Answer:

gain or loses electrons.

Explanation:

Because the atom need to be balanced.

5 0
3 years ago
How many valence electrons are in each atom?
Zarrin [17]
Group 1 atoms only have one. Group 2 has 2 valence electrons, and so on.
7 0
4 years ago
for the given reaction, what volume of o2 would be required to react with 4.8 l of co , measured at the same temperature and pre
SVEN [57.7K]

We can see that 2 moles of The no react with 1 mole of O2 using this equation. 4.8 L NO x 1 L O2 / 2 L NO = 2.4 L of O2 are needed at constant pressure and temperature.

What is an example of pressure?

One can see a simple illustration of pressure by using a knife against a few fruit. If you press the flat side of the knife against the fruit, the top won't be cut. The force is spread more than a wide area (low pressure).

What are different types of pressure?

The physical pressure exerted to an object is referred to as pressure. Per unit area, a parallel force is applied to the surface of the objects. F/A (Force per Area) is the basic formula for pressure.

To know more about pressure visit:

brainly.com/question/12971272

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7 0
1 year ago
Calculate the pH of a C6H5OH phenol solution, whose hydronium ion concentration [H3O +] is 1.8 x 10e-5 M
Sidana [21]

Answer: The pH of phenol solution is 4.7

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydronium ion concentration.

pH=-\log [H_3O^+]

Given : [H_3O^+]=1.8\times 10^{-5}M

Putting in the values we get

pH=-\log[1.8\times 10^{-5}M]

pH=4.7

Thus pH of phenol solution is 4.7

5 0
4 years ago
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