Question: Answer these two questions correctly please. Be careful with the other chegg answers for these two questions online because, I've look on it and all

Answer these two questions correctly please. Be careful with the other chegg answers for these two questions online because, I've look on it and all the answers online are false. So please be careful about the details and use your knowledge.

A crystal was analyzed using X-ray diffraction with radiation from a molybdenum source. The observed angle was 7.91. Determine the distance between layers of the crystal. Calculate the heat energy released when 16.2g of liquid mercury at 25.00C is converted to solid mercury at its melting point

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