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Anarel [89]
3 years ago
9

Chlorine has two isotopes. The isotope with a mass of 34.969 amu has a relative abundance of 75.77%. The isotope with a mass of

36.966 amu has a relative abundance of 24.33%. Calculate the atomic mass of chlorine. Please show how you got answer. lots of points. big money$$$$$$$$
Chemistry
2 answers:
Mars2501 [29]3 years ago
5 0
34.969*.7577+36.966*.2433=35.489
Viefleur [7K]3 years ago
5 0
(34.969*0.7577)+(36.966*0.2433) = the atomic mass of chlorine.

Input into a calculator and your answer is: 35.4898 AMU (atomic mass units)


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Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq)HCl(aq) , as desc
LekaFEV [45]

Answer:

1.131g of MnO2

Explanation:

Step 1:

The balanced equation for the reaction.

MnO2(s) + 4HCl(aq)—> MnCl2(aq) + 2H2O(l) + Cl2(g)

Step 2:

Data obtained from the question. This includes:

Volume (V) of Cl2 = 295mL = 0.295L

Temperature (T) = 25°C = 25°C + 273 = 298K

Pressure (P) = 795 Torr = 795/760 = 1.05 atm

Number of mole (n) of Cl2 =.?

Gas constant (R) = 0.082atm.L/Kmol

Step 3:

Determination of the number of mole of Cl2 produced. The number of mole of Cl2 produced from the reaction can be obtained by applying the ideal gas equation as follow:

PV = nRT

1.05 x 0.295 = n x 0.082 x 298

Divide both side by 0.082 x 298

n = (1.05 x 0.295)/(0.082 x 298)

n = 0.013 mole.

Therefore, the number of mole of Cl2 produced is 0.013 mole.

Step 4:

Determination of number of mole of MnO2 needed to produce 0.013 mole of Cl2.

This is illustrated below:

From the balanced equation above,

1 mole of MnO2 produced 1 mole of Cl2.

Therefore, it will also take 0.013 mole of MnO2 to produce 0.013 mole of Cl2.

Step 5:

Converting 0.013 mole of MnO2 to grams. This is illustrated below:

Number of mole MnO2 = 0.013 mole

Molar Mass of MnO2 = 55 + (2x16) = 87g/mol

Mass of MnO2 =?

Mass = number of mole x molar Mass

Mass of MnO2 = 0.013 x 87

Mass of MnO2 = 1.131g

Therefore 1.131g of MnO2 should be added to excess HCl.

4 0
3 years ago
What is √200 in simplest form?​
GREYUIT [131]

Answer:

14.14

If you round it I'm guessing it would be 14.

Good luck <3

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4 years ago
What is the formula of the ionic compound expected to form between the elements cl and al?
patriot [66]

Ionic compounds are those compounds which are made up of ions. These ions can exist as positive or negative ions. Those ions which has tendency to lose electrons are said to be cations (positive ions) such as metals and those ions which has tendency to gain electrons are said to be anions (negative ions) such as non-metals.

The formula for ionic compounds are given as:

First, the symbols of the cation and anion should be identified. After that, charge on the cation and anion should be identified. Write the chemical formula with the help of drop and swap method.

Now,

The chemical symbols for Aluminium is Al and for chlorine is Cl.

The charge on Al is +3 and on Cl is -1, neglect the positive and negative signs and by using drop and swap method i.e. the charge on the aluminium will go as a subscript of the chlorine and the charge on the chlorine will go as a subscript of the aluminium which is shown in the image.

Thus, the chemical formula between Al and Cl is AlCl_{3}.

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3 years ago
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Answer:

A: Endoplasmic reticulum

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Explanation:

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3. A sample of air in a syringe exerts a pressure of 1.02 atm at 22.0°C. The syringe is placed in a boiling-water bath at 100.0°
inysia [295]

Answer:

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explanation:

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