Calculate the equilibrium constant expressed as log_10⁡K for CO_2⇌CO+1/2 O_2 at (a) 500K (b) 2000K and compare to the values in the thermodynamics books.

What is the pH of a solution that has a concentration of hydronium ions that is 3.6 * 10-5 molar H3O+? Show, or explain, the work used to solve this problem

Consider the following reaction, for which ∆H° = + 87.9 kJ/mol and ∆S° = + 170.2 J/mol·K. PCl5 (g) → PCl3 (g) + Cl2 (g) Assume ∆H° and ∆S° do not vary appreciably with change in temperature.

What are the 4 main groups of carbon compounds found in living things? * ?

Can a new element be discovered and be placed in between copper and nickel on the periodic table? Explain your answer.

Which of the following quantum number combinations is not allowed in an atom? n = 2, l = 0, m subscript l = 0 n = 3, l = 2, m subscript l = - 1 n = 6, l = 5, m subscript l = - 4 n = 1, l = 0, m subscript l = 1

Ryan is a 13-year-old male who has just entered puberty. Which change can Ryan expect during this stage of his life? a thinning of body hair an increase in high-risk behaviors a more restful sleep pattern a decrease in vocal ability

What is the role of roughages in the balanced diet

How is enthalpy used to predict whether a reaction is endothermic or exothermic? when the enthalpy of the reactants is higher than the enthalpy of the products, the reaction is endothermic.

How many moles of ammonia, NH3, can be made from 7.5 moles of H2? N2 + 3H2 → 2NH3 A. 15 moles B. 22 moles C. 5 moles

A cube of aluminum (density = 2.70 g/ml) has a mass of 17.2 g. what is the edge length of the cube?