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LekaFEV [45]
2 years ago
11

Using the periodic table, find the molecular mass of H2. H2 = g/mole

Chemistry
1 answer:
alekssr [168]2 years ago
5 0
MH₂ = 2×mH = 2×1g = 2 g/mol
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The solubility of acetanilide in hot water (5.5 g/100 ml at 100∘C) is not very great, and its solubility in cold water (0.53 g/
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Answer:

89.4%

Explanation:

Initially, there is 5.0 of the acetanilide in 100 mL of water, then the solution is chilled at 0ºC. The solubility represents the amount that the solvent (water) can dissolve of the solute (acetanilide). So, at 0ºC, 100 mL of water can dissolve till 0.53 g of the compound, the rest will precipitate and will be recovered.

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Answer : The final volume of gas will be, 26.3 mL

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Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

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P_2 = final pressure of gas = 0.993 atm

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T_2 = final temperature of gas = 15.0^oC=273+15.0=288K

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\frac{0.974 atm\times 27.5 mL}{295K}=\frac{0.993 atm\times V_2}{288K}

V_2=26.3mL

Therefore, the final volume of gas will be, 26.3 mL

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