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2 years ago

A sample of gas consists of 4.0 moles, and exists at stp. What is the volume of the gas?

Chemistry

2 answers:

faust18 [17]2 years ago

6 0

Answer:

The volume of the gas is 89.60

Explanation:

When converting from moles to volume, you would multiply by 22.4 because 1 mole equals 22.4 liters at STP.

So...

4.0 moles * 22.4 liters =

89.60 liters

stiv31 [10]2 years ago

4 0

Answer:

$\boxed {\boxed {\sf 89.6 \ liters}}$

Explanation:

At STP (standard temperature and pressure), all gases have a volume of 22.4 liters per mole.

$\frac {22.4 \ L }{1 \ mol }$

Multiply by the given number of moles, 4.0

$4.0 \ mol *\frac {22.4 \ L }{1 \ mol }$

The moles will cancel out. The 1 in the denominator can be ignored, so this becomes a simple multiplication problem.

$4.0 * {22.4 \ L }=89.6 \ L$

4.0 moles of a gas at STP have a volume of 89.6 liters.

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Given that you have 14.5 moles of n2, how many moles of h2 are theoretically needed to produce 30.0 moles of nh3 according to re

erastovalidia [21]

45 moles of H₂ are theoretically needed to produce 30.0 moles of NH₃

<h3>Further explanation</h3>

Stoichiometry in Chemistry learn about chemicals mainly emphasizes quantitative, such as the calculation of volume, mass, number, which is related to numbers, molecules, elements, etc.

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

In the reaction there are also manifestations of reagent substances namely gas (g), liquid (liquid / l), solid (solid / s) and solution (aqueous / aq).

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

Mole

The mole itself is the number of particles contained in a substance amounting to 6.02.10²³

Mole can also be sought if the amount of substance mass and its molar mass is known

$\large{\boxed{\boxed{\bold{mol=\frac{mass}{molar\:mass}}}}$

Reaction that happens :

N₂ +3H₂ ⇒ 2NH₃

mole N₂ : H₂ : NH₃ = 1 : 3 : 2

To produce 30.0 moles of NH₃,

H₂ needed :

$mole~H_2~=~\frac{3}{2}\times~30~mole$

mole H₂ = 45 mole

N₂ needed :

$mole~N_2~=~\frac{1}{2}~\times~30$

mole N₂ = 15 mole

So the minimum N₂ needed is: 15 mole

14.5 moles of N₂ can only produce NH₃ :

$mole~NH_3~=~\frac{2}{1}~\times~14.5$

mole NH₃ = 29 mole

<h3>Learn more </h3>

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brainly.com/question/5233234

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Keywords: mole, NH₃, N₂, H₂

7 0

3 years ago

Read 2 more answers

Write down five things that you personally could do in your day-to-day life to help with the problem of climate change. Write do

beks73 [17]

Before that, we need to know what causes climate change. One of the main reasons are the carbon dioxide released into the atmosphere, it traps heat but allow more heat to enter the earth, therefore climate increases over the years.

1. Set air conditioner to a higher temperature (eg. 25°C) or turn on fans instead.
Operating AC can use a lot of energy, and these energy is produced by burning if fossil fuels which releases carbon dioxide.

2. Take public transports instead of cars. The more private cars there are, the more pollutants it release, these pollutants includes carbon dioxide.

3. Turn off all the lights / electrical appliances when we leave a place. Again, electrical appliances require energy which is produced by burning of fossil fuels that gives out carbon dioxide.

4. Recycle and reuse paper that is only used on one side. Papers are extracted from trees and one main function of trees is to absorb carbon dioxide from the air. If many trees are cut, the amount of carbon dioxide in air would increase.

5. Do the laundry only if you have clothes full for the machine. If the washing machine is not full and you're starting it up, it really uses a lot of energy and water, which all again it triggers the release of carbon dioxide.

4 0

3 years ago

Calculate the number of moles<br> 41.0 g of Ca(NO3)2 <br> 1.48 g of Ca(OH)2 <br> 3.40 g of CaSO4

Lemur [1.5K]

First. moles is just a label for a number of things. just like a dozen = 12, a gross = 144, a mole = 6022 with another 20 zeros after the 2

next

moles = mass / molecular weight.

molecular weight = sum of atomic mass from the periodic table

atomic mass MnO2 = atomic mass Mn + 2 x atomic mass O
= 54.94 + 2 x 16 = 86.94 g/mole

so moles MnO2 = 98.0 grams / (86.94 g/mole) = 1.13 moles

notice that I only gave 3 digits? that because of sig figs read the link below if you don't understand....

mw C5H12 = 5 x 12 + 12 x 1 = 72 g/mole

so moles C5H12 = 12.0 g / 72.0 g/mole = 0.167 moles

mw XeF6 = 131.3+ 6 x 19.00 = 245.3

so moles XeF6 = 100 g / 245.3 g/mole = 0.4077 moles

I've also provided a link to a periodic table. if you need atomic weights click on any element and it will give you the
details.

8 0

3 years ago

Under the same conditions of temperature and pressure, which of the following gases would behave most like an ideal gas?Ne, N₂,

malfutka [58]

Answer:

Explanation:

Atomic number of Ne is 10.

Electronic configuration of Ne:

$1s^2 2s^2 2p^6$

Octet of Ne is complete . Element having complete octet are stable and behave ideal gas.

$N_2$ and $CH_4$ are reactive and hence, does not behave as ideal gas.

3 0

3 years ago

A mass of 2kg has a kinetic energy of 16J.what is the momentum of the body?

juin [17]

Explanation:

mass -2kg

energy -16j

k.e -1/2mv

16j= 1/2×2×V

16× 2/2 =V

16 = V

√16= V

V= 4m/s

Then

momentum=MV

=2×4

=8kgm/s

3 0

3 years ago