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You have a solution that contains both calcium and magnesium nitrate. The concentration of each is 0.1250 M. What is the pH of the solution when the least soluble one is precipitated before the most soluble one starts precipitating? The solubility product constant for the metal hydroxide are K = 4.68 × 10^-6 and the K = 2.06 × 10^-13
At a certain temperature, 0.920 mol of SO3 is placed in a 2.00-L container.At equilibrium, 0.170 mol of O2 is present. Calculate Kc
14 g of Si reacts with 16 g of O to produce SiO2, the only product, with no reactant left over. How much SiO2 would be produced from 34 g of Si and excess O?
Consider the following reaction: 2 HI(g) -> H2(g) + I2(g) If 3.55 moles of HI(g), 0.550 moles of H2, and 0.630 moles of I2 are at equilibrium in a 1.00 L container at 915 K
Lewis Structure for a Nitrate Ion (NO3-1). Assign the formal charge for the central atom, Nitrogen. What is that formal charge
the thermal equilibrium temperature of the metal sample plus water mixture is 24.6 *C. what is the specific heat of the metal?
A certain 1.00 L buffer contains 0.600 mol of a base and 0.430 mol of the conjugate acid. The pH is 8.30. What is the pKa fo the conjugate acid
How is cyclohexene converted to cyclohexane using first HCl, secon MG and ether, and third H2O. What type of reaction is this
evaporating sweat cools the body because evaporation is endothermic and absorbs 2.44 per gram of water evaporated.
It is assumed that the relative standarddeviation of the method is sr ? s = 4 ppt forcarbon and 6 ppt for hydrogen. The means of the reported resultsare 68.5% C and 4.88% H. At the 95% confidence level, is there anyindication of systematic error i..
Concentrated HCl is a 12.0 M solution of HCl in water. How many milliliters of concentrated HCl must be diluted to 250 mL so that the resulting solution is 0.0500 M in HCl
A first order chemical reaction has a rate constant of 5.8×104 s-1 at 10 °C and a rate constant of 4.7×105 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction.
How much heat is emitted when 4.55 of water condenses at 25 ? The heat of vaporization of water at 25 is 44.0.
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