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ممكن طريقه الحل

[8] A sample of hydrogen gas was collected over water at 21C and 0.9 atm. The volume of the container was 7.80 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 0.025 atm at 21C.)
(A) 0.283 g
(B) 435 g
(C) 0.571 g #
(D) 7.14 g

وهاذا



[9] Calculate the volume of CO2 produced at 37°C and 1 atm when 0.031 mol of glucose is used up in the reaction.
C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(L)
(A) 4.73 L#
(B) 0.256 L
(C) 3.85 L
(D) 6.32 x 10-3 L