The maximum allowable concentration of H2S(g) in air is 20mg per kilogram of air (20 ppm by mass). How many gramsof FeS would be required to react with hydrochloric acidto produce this concentration at 1.00 atm and 25 °C in anaverage room measuring 12 ft x 20 ft x 8 ft? (Under theseconditions, the average molar mass of air is 29.0 g/mol.)

Q: What is the molar concentration of oxygen in water at 25C for a partial pressure of 1.0 atm (KH =…

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Q: the solutions are additive and that Kp = 4.4 x 104 for methylamine.

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Q: 7. What is the pH of a 0.025 mol/L solution of methanoic acid? K₁ = 1.8 x 104

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A: This question belongs to Biomolecules.

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Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.