For a hydrogen fuel cell stack: the power is 10 kW, the voltage is 0.7 V, the operating temperature is 80 oC, the operating pressure is 220 kPa, the air stochiometry is 2, and the inlet air is at 70 oC and 70% relative humidity . (1) what is the usage of hydrogen?

(2) What is the relative humidity of the exit air

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The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases

What is the polyatamic ion of thiosulfate