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- What pressure is required to achieve a CO2 concentration of 0.0690 mol L−1 at 20∘C?What partial pressure of hydrogen results in a molar concentration of 1.0 mmol dm-3 in water at 25 °c?The equilibrium constant Kc for the reaction N2(g) + O2(g)⇋ 2NO(g) at 1200 degrees Celsius is 1.00 x 10-5. Calculate the equilibrium molar concentrations of NO, N2, O2 in a reaction vessel of volume 10.00 L that initially held 0.312 mol N2 and 0.407 mol O2.
- Chemistry What pressure is required to achieve a CO2 concentration of 0.0950 mol L−1 at 20 ∘C ?1.Calculate the normality of the solutions containing 5.267g/L K2Cr2O7 (the Cr is reduced to Cr3+).(FW=294.19 g/mol) 2.A and B react as follows: A + B 2C. The equilibrium constant is 5.0 x 106. If 0.40 mol of Aand 0.70 mol of B are mixed in 1L, what are the concentrations of A, B and C after reaction? 3. The following data is given at a certain temperature:(1) 2N2 (g) + O2 (g) 2N2O (g) K1 = 1.2 x 10-35(2) N2O4 (g) 2NO2 (g) K2 = 4.6 x 10-3(3) ½N2 (g) + O2 (g) NO2 (g) K3 = 4.1 x 10-9Calculate the molar equilibrium constant, K for the reaction:2N2O (g) + 3O2 (g) 2N2O4 (g)The equilibrium constant for the reaction K3PO4(s) ⇆ 3 K+(aq) + PO43−(aq) is 1.3x10−6 at 23.9oC. What is ΔG (in kJ/mol) for the reaction?
- What is the molar concentration of potassium chloride (Formula Weight: 74.55g/mole) in a 25% (w/v) solution?Calculate the value of the equilibrium constant Kc for the chemical process 3A + 2 B ⇌ 2 C + 2 D , knowing that the volume of the reactor is 1 L and the quantity of the species at the equilibrium are 0.8 mol of Aeq, 2.6 mol of Beq, 1.6 mol of Ceq, and 0.4 mol of Deq.In determining the volume of CO2 in the flask, the flask was filled with water and the total volume of the water in the stoppered flask was measured. A student filling the Erlenmeyer flask with water was in a rush and did not notice small air bubbles under the stopper. How would this error affect the experimental molar volume of CO2?
- Write the reaction quotient, Qc, and the equilibrium constant, Kc, for 2N2O5(g) ⥫⥬ 4NO2(g) + O2(g)How many (a) millimoles, (b) milliequivalents, and (c) milliosmoles of calcium chloride (CaCl2 . 2H2O; MW: 147) are represented in 147 mL of a 10% w/v calcium chloride solution?Phosphorus is present in seawater to the extent of 0.07ppm by mass. Assuming that the phosphorus is present asdihydrogenphosphate, H2PO4-, calculate the correspondingmolar concentration of H2PO4- in seawater.
