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Agata [3.3K]
3 years ago
9

muriatic acid is the commercial name for hydrochloric acid that can be purchased from hardware stores as a solution that is 30%(

w/w) HCL. What mass of this solution contains 7.5g of HCL?,
Chemistry
1 answer:
SSSSS [86.1K]3 years ago
5 0
We have 30% (w/w) HCl this means : 
               100 g solution contains 30 g HCl
               ?? g solution contains 7.5 g HCl
By cross multiplication:
Mass of solution = \frac{100 x 7.5 }{30} = 25 g solution
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ΔU for a van der Waals gas increases by 475 J in an expansion process, and the magnitude of w is 93.0 J. calculate the magnitude of q for the process.

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Explanation:

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During gas expansion process, heat is added to the gas.

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q = 568 J

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