At 125oC, Kp = 0.25 for the reaction: NaHCO3 (s) ⇔ Na2CO3 (s) + CO2 (g) + H2O (g) A 1.00 L flask containing 10 g of NaHCO3 is evacuated and heated to 125oC. Calculate the partial pressures of CO2 and H2O after equilibrium is established.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

a) the particles of the chair are strongly held together.

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the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.