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Aleksandr [31]
2 years ago
5

Calculate the volume of chlorine molecules produced at room temperature and pressure, when 234g of sodium chloride are electroly

sed. (1 mole of chlorine molecules has a volume of 24 dm³ at room temperature and pressure).​
Chemistry
1 answer:
rewona [7]2 years ago
4 0

The volume of chlorine molecules produced at STP would be 96 dm³.

<h3>Stoichiometric problem</h3>

Sodium chloride ionizes during electrolysis to produce sodium and chlorine ions as follows:

NaCl --- > Na^+ + Cl^-

This means that 1 mole of sodium chloride will produce 1 mole of sodium ion and 1 mole of chlorine ion respectively.

Recall that: mole = mass/molar mass

Hence, 234 g of sodium chloride will give:

                         234/58.44 = 4.00 moles.

Thus, the equivalent number of moles of chlorine produced by 234 g of sodium chloride will be 4 moles.

Recall that:

1 mole of every gas at Standard Temperature and Pressure = 24 Liters.

Hence:

4 moles of chlorine = 4 x 24 = 96 Liters or 96 dm³.

More on stoichiometric problems can be found here: brainly.com/question/14465605

#SPJ1

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Hi Soccerbrandon,

So in order to do unit conversion in this situation, it is best to first convert kg into g and then g into mg. The conversion rates are easy to remember individually for both of them.

There are 1000 g in 1 kg.
There are 1000 mg in 1 g.

So lets use 25 kg as an example:
25 kg times \frac{1000g}{1kg} gives 25000 g in 25 kg.
25000 g times \frac{1000mg}{1g} gives 25000000mg in 25000g.
This gives us the answer that 25000000mg is equal to 25kg.

Hope it helps!!

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3 years ago
Silver has a density of 10.5 grams/cm3. What would be the mass of a 5 cm3 piece of sliver
enyata [817]

Answer:

52.5 g

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scientists want to place a telescope on the moon to prove their view of distant planets. The telescope weighs 200 pounds on Eart
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A rigid cylinder contains a sample of gas at STP. What is the pressure of this
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3 years ago
A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00. Assuming there was no Pb-206 present when the samp
nikdorinn [45]

Answer:

2.1x10⁹ years

Explanation:

U-238 is a radioactive substance, which decays in radioactive particles. It means that this substance will lose mass, and will form another compound, the Pb-206.

The time need for a compound loses half of its mass is called half-life, and knowing the initial mass (mi) and the final mass (m) the number of half-lives passed (n) can be found by:

m = mi/2ⁿ

The mass of Pb-206 will be the mass that was lost by U-238, so it will be mi - m. Thus, the mass ration can be expressed as:

(mi-m)/m = 0.337/1

mi - m = 0.337m

mi = 1.337m

Substituing mi in the expression of half-life:

m = 1.337m/2ⁿ

2ⁿ = 1.337m/m

2ⁿ = 1.337

ln(2ⁿ) = ln(1.337)

n*ln(2) = ln(1.337)

n = ln(1.337)/ln2

n = 0.4190

The time passed (t), or the age of the sample, is the half-life time multiplied by n:

t = 4.5x10⁹ * 0.4190

t = 1.88x10⁹ ≅ 2.1x10⁹ years

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