A student determines that an aqueous solution that contains 0.262 M potassium cyanide and 0.218 M hydrocyanic acid, also has an H3O+ concentration of 4.06×10-10 M. Based on these data, calculate the value of the equilibrium constant K for the equilibrium: HCN(aq) + H2O H3O+(aq) + CN-(aq)

Calculate K as is usually done, omitting the solvent, water, from the expression for K: K

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

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. 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

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons