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andre [41]
3 years ago
7

What total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75*10^14 Hz

Chemistry
1 answer:
Murrr4er [49]3 years ago
5 0

Answer:

1.1 \times 10^{5} J

Explanation:

The computation is shown below:

Data provided in the question

The frequency of the radio wave is f =  2.75 \times 10^{14}\ Hz

Let us assume the number of photons is N = nNA = 1 \times 6.022 \times 10^{23}

= 6.022 \times 10^{23}

And, h = 6.626 \times 10{-34} J

Based on the above information, the total energy is

As we know that

E = N h f

= 6.022 \times 10^{23} \times  6.626 \times 10^{-34}  \times 2.75 \times 10^{14}

= 1.1 \times 10^{5} J

We just applied the above formula so that the total energy contained could come i.e by multiplying the three items so that the correct value could come

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3,85 g of Fe

Explanation:

1- The first thing to do is calculate the molar mass of the Fe2O3 compound. With the help of a periodic table, the weights of the atoms are searched, and the sum is made:

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1 mole of Fe2O3_____ 2 moles of Fe

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159.65 g of Fe2O3 _____ 111.76 g of Fe

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