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Sholpan [36]
3 years ago
5

How many moles of KCl would be dissolved in 4 L of water to make a 2 M solution?

Chemistry
1 answer:
Nataly [62]3 years ago
3 0
Answer:
             Moles  =  8 moles

Solution:
              Molarity is given as,

                         Molarity  =  Moles / Volume of Solution   ------ (1)

Data Given;
                   Molarity  =  2 M

                   Volume  =  4 L

Solving eq.1 for Moles,

                       Moles  =  Molarity × Volume of Solution

Putting values,

                       Moles  =  2 mol.L⁻¹ × 4 L

                       Moles  =  8 moles
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A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.68
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First of all, as you seen the gases are noble which means that will not react with each other and in this case each gas create individual pressure.  

P_{T}= total pressure  

P_{Ne} = pressure of neon  

P_{Ar} = pressure of argon  

P_{He} = pressure of helium {which is required}

P_{T} = P_{Ne} + P_{Ar} + P_{He}    

1.25 = 0.68 + 0.35 +  P_{He}

P_{He}   = 1.25  - [0.68 + 0.35] = 0.22 atm

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3 years ago
What discovery was made about particles with an accelerator in 1998
kramer

Answer/Explanation:

In June 1998 in Japan a scientist discovered that neutrinos (which is a type of particle) has weight, mass. This was later proven with some very convincing strong evidence.

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3 years ago
What is the empirical formula of propene CH3 CH2 CH2​
kiruha [24]

Answer:

<u>CH</u>

Explanation:

Molecular formula of propene : <u>C₃H₆</u>

Take the HCF of carbon and hydrogen atoms :

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  • 6 = 2 x 3

Then, we can write the formula as :

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Empirical Formula :

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<u></u>

The empirical formula of propene is <u>CH</u>

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