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xz_007 [3.2K]
3 years ago
5

Determine the concentration of H+ ions in an aqueous solution where [OH-] =2.25 × 10^-4 M. I have 29 minutes I beg u guys pls hu

rry. ​
Chemistry
1 answer:
mixas84 [53]3 years ago
6 0

but where Is the volume in order for us to determine the concentration. since we have moles in H+ ions

then you can say

concentration = M*1000/V

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Bis the correct answer
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On a hot summer day you and some friends decide you want to cool down your pool. Determine the mass of ice you would need to add
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Answer: The mass of ice you would need to add to bring the equilibrium temperature of the system to 300 K is 16.14 \times 10^{4} kg.

Explanation:

We know that relation between heat energy and specific heat is as follows.

                 q = m \times S \times \Delta T

As density of water is 1 kg/L and volume is given as 400,000 L. Therefore, mass of water is as follows.

          Mass of water = Volume × Density

                                  = 400,000 L \times 1 kg/L

                                  = 400,000 kg

or,                              = 400,000 \times 10^{3} g    (as 1 kg = 1000 g)

Specific heat of water is 4.2 J/gm K. Therefore, change in temperature is as follows.

         \Delta T = 305 K - 273 K

                    = 32 K

Now, putting the given values into the above formula and calculate the heat energy as follows.

            q = m \times S \times \Delta T

                = 400,000 \times 10^{3} \times 4.2 \times 32 K

                = 5376 \times 10^{7} J

or,            = 5376 \times 10^{4} kJ

According to the enthalpy of melting of ice 333 kJ/Kg of energy absorbed by by 1 kg of ice. Hence, mass required to absorb energy of 5376 \times 10^{4} kJ  is calculated as follows.

            Mass = \frac{5376 \times 10^{4} kJ}{333 kJ/Kg} \times 1 kg

                      = 16.14 \times 10^{4} kg

Thus, we can conclude that the mass of ice you would need to add to bring the equilibrium temperature of the system to 300 K is 16.14 \times 10^{4} kg.

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3 years ago
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Explanation:

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What is the simplest formula of a solid containing a, b, and c atoms in a cubic lattice in which the a atoms occupy the corners,
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Answer:

c. abc₃  

Step-by-step explanation:

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=====

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=====

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