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NemiM [27]
2 years ago
13

What is the mass of three moles of chlorine?

Chemistry
2 answers:
Elina [12.6K]2 years ago
4 0

Answer:

The answer to your question is

a) 212.7 g

b) 110 g

Explanation:

a) Mass of three moles of Chlorine

Atomic weight of Chlorine = 35.45 g but chlorine is a diatomic molecule then the atomic weight = 2(35.45) g = 70.9 g

               70.9 g of Cl₂ --------------- 1 mol

                  x                  --------------- 3 moles

                 x = 3(70.9)/1

                 x = 212.7 g

b) mass of one mole of K₂S

Molecular mass = (39 x 2) + (32 x 1)

                           = 78 + 32

                           = 110 g

                   110 g of K₂S ----------------  1 mol

 

Genrish500 [490]2 years ago
4 0
The first one I got this

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I don’t know how to solve this
stepladder [879]
Hi,

Answer is 191.2.

800J = 191.2 cal

Hope this helps.
7 0
3 years ago
a water sample is found to have a cl- content of 100ppm as nacl what is the concentration of chloride in moles per liter
ladessa [460]

Answer:

The concentration of chloride ion is 2.82\times10^{-3}\;mol/L

Explanation:

We know that 1 ppm is equal to 1 mg/L.

So, the Cl^- content 100 ppm suggests the presence of 100 mg of Cl^- in 1 L of solution.

The molar mass of Cl^- is equal to the molar mass of Cl atom as the mass of the excess electron in Cl^- is negligible as compared to the mass of Cl atom.

So, the molar mass of Cl^- is 35.453 g/mol.

Number of moles = (Mass)/(Molar mass)

Hence, the number of moles (N) of Cl^- present in 100 mg (0.100 g) of Cl^- is calculated as shown below:

N=\frac{0.100\;g}{35.453\;g/mol}=2.82\times 10^{-3}\;mol

So, there is 2.82\times10^{-3}\;mol of Cl^- present in 1 L of solution.

5 0
3 years ago
A beam of light has a wavelength of 24.0 μm ( μm = 10 -6m). What is its frequency?
vfiekz [6]

Answer:

Frequency = 1.25 ×10¹³ Hz

Explanation:

Given data:

Wavelength of light = 24.0  μm (2.4 ×10⁻⁵ m)

Frequency = ?

Solution:

Formula:

Speed of light = wavelength × frequency

Speed of light /wavelength = frequency

Frequency = 3×10⁸ m /s /2.4 ×10⁻⁵m

Frequency = 1.25 ×10¹³ s⁻¹

s⁻¹ = Hz

Frequency = 1.25 ×10¹³ Hz

6 0
3 years ago
How does a phenol red-containing solution look if co2 level is low?
vampirchik [111]

Answer:

The variables to be examined in relation to carbon dioxide use are the amount of light exposure and amount of dissolved CO2. Phenol red is yellow/orange under acidic conditions, that is when the pH of the solution is less than 7 (e.g. pH = 6). This occurs when the concentration of CO2 is high.

Explanation:

is this correct

4 0
3 years ago
Describe the difference between at atom and an ion in regards to their substaomic<br> particles.
tangare [24]

Answer:

-Atoms are neutral; they contain the same number of protons as electrons. By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion.

-An atom has an equal number of protons and electrons. An ion has an imbalance between the number of protons and electrons.

-An atom has no electrical charge. Ions have an electrical charge because they have an imbalance of protons and electrons.

Explanation:

A cheerful teen willing to help,

wishing you a splendiferous day,

stay salty...

5 0
2 years ago
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