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Two substances A and B, initially at different temperatures, come into contact, and reach thermal equilibrium at 46.7 degrees celsius. The mass of substance A is 1.65g and it is initially at a temperature of 20.5 degrees celsius. The mass of substances B is 25.2-g and it is initially at a temperature of 52.7 degrees celsius. If the specific heat of substance B is 1.17 J/g-degrees celsius, what is the specific heat of substance A?
A solution was prepared by dissolving 432 mg of K4Fe(CN)6 in water and diluting to 1.5L. Calculate the K+ concentration in ppm
A 1.00 L solution contains 4*10^-4 M Cu(NO3)2 and 1.6*10^-3 M ethylenediamine (en). the Kf for Cu(en)2^+2 is 1*10^20. What is the concentration of Cu^+2 (aq) in this solution
Determine the freezing point (°C) of a 0.015 molal aqueous solution of MgSO4. Assume i = 2.0 for MgSO4. The molal freezing-point-depression constant of water is 1.86 °C/m..
determine the bond angles of BF3 and CH2O and comment on why the angles are different.
when 0.800 grams of NaOH is dissolved in 100.0 grams of water, the temperature of the solution increases from 25.00 degree to 27.06 degree .
What is the approximate K+ ion concentration in a 0.75 M K2SO4 solution? A) 0.375 M B) 0.75 M C) 1.25 M D) 1.50 M E) 2.25 M
Calculate the volume of O2, at STP, required for the complete combustion of 165 g octane (C8H18) to CO2 and H2O.
What would be the number of ions present in a solution of an electrolyte if the freezing point is lowered to -5.1 degree celsuis. given that a non-electrolyte of the same concentration as the electrolyte lowers the freezing point of the same to a ..
An aqueous solution of 0.043 M weak acid, HX, has a pH of 3.92. What is the pH of the solution if 0.021 mol of KX is dissolved in one liter of the weak acid
From the values of delta H and delta S, predict which of the following reactions would be spontaneous at 25*C:
The most two most abundant elements in the crust are oxygen (4.55 X 10^5 g/t, where t stands for metric ton; 1 t=1000kg) and silicon (2.72 X 10^5 g/t), and the two rarest non radioactive elements are ruthenium and rhodium, each with an abundance o..
salicylic acid reacts with methanol to produce oil of wintergreen and water. If water is added to the solution, a precipitate is formed. identify the precipitate and explain why it is formed.
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