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ASHA 777 [7]
3 years ago
10

During a reaction, H for reactants is -750 kJ/mol and H for products is 920 kJ/mol. Which statement is correct about the reactio

n and correctly compares the energy in bonds?

Chemistry
1 answer:
vagabundo [1.1K]3 years ago
8 0

Answer:

a

Explanation:

the ones are stronger and herder to break so it will take more energy to break them then when they are made

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Which of the following are the requirements when creating a hypothesis for an experiment? Check ALL that apply. A: A hypothesis
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Answer:

You're answer would be B.

Explanation:

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Ideal He gas expanded at constant pressure of 3 atm until its volume was increased from 9 liters to 15 liters. During this proce
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Explanation:

The given data is as follows.

             P = 3 atm

                = 3 atm \times \frac{1.01325 \times 10^{5} Pa}{1 atm}  

                 = 3.03975 \times 10^{5} Pa

    V_{1} = 9 L = 9 \times 10^{-3} m^{3}    (as 1 L = 0.001 m^{3}),  

        V_{2} = 15 L = 15 \times 10^{-3} m^{3}

            Heat energy = 800 J

As relation between work, pressure and change in volume is as follows.

                  W = P \times \Delta V

or,                W = P \times (V_{2} - V_{1})

Therefore, putting the given values into the above formula as follows.

                  W = P \times (V_{2} - V_{1})

                      = 3.03975 \times 10^{5} Pa \times (15 \times 10^{-3} m^{3} - 9 \times 10^{-3} m^{3})

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or,                   = 1823.85 J

As internal energy of the gas \Delta E is as follows.

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                                  = -1023.85 J

Thus, we can conclude that the internal energy change of the given gas is -1023.85 J.

8 0
3 years ago
The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of _____.
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<h3>Question :</h3>

The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of _____.

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The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of <u>biotechnology</u>.

So correct option is 2nd biotechnology.

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Biotechnology is the use of biological structures and processes for useful industrial purposes, whether product or function.

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