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Regard as the chemical reactions taking place during the electrolysis experiment, explain which observations should you expect to see?
A. Bubbles from the evolution of gases
B. Blackening of one of the platinum electrodes
C. Green aqueous solution of dissolved Cu2+ ions
D. Condensation of vapors resulting from an exothermic reaction
how many grams per liter of sodium acetate would need to be dissolved to produce a ph of 8.00 in a hydrolosis reaction
Pressure was exerted with a piston on molten naphthalene at 95°C. The vapour pressure of naphthalene under 1.0 bar is 2.0 kPa and its densityis 0.962 g cm 3. What is its vapour pressure when the pressure on the liquid is 15 MPa
Under constant pressure conditions a sample of hydrogen gas initially at 13 degrees C and 8.0 L is cooled until its final volume is 1.7L. What is its final temperature
Identify and describe the structure and function of specialised cells of protection, sensation and secretion in the integumentary system
Nickel nitrate and potassium carbonate react to form nickel carbonate and potassium nitrate. How many milliliters of 0.55M Ni(NO3)¬2 are needed to react with 85 mL of 0.25M K2CO3? First, write a balanced equation.
A 6.55 g sample of aniline (C6H5NH2) was combusted in a bomb calorimeter. If the temperature rose from 22.25 ? C to 55.15 ? C, use the information below to determine the heat capacity of the calorimeter in kJ
How much PV work is done and what is the value of total energy change (in kilojoules) for the reaction of 0.50 mol of H2 with 0.25 mol of O2 at atmospheric pressure if the volume change is -5.6L?
In the Bohr model, the potential energy of a hydrogen atom in the nth orbit has a value we will call Un. What is the potential energy of a hydrogen atom when the electron is in the (n+1)th Bohr orbit. (Give your answers in terms of Un and n.)
there are some given compounds ch3br rbf ch3oh co2arrange all these compounds in order of increasing boiling points and
Calculate the pH of the final solution after 250 mL of a 0.157 mol dm-3 solution of HCl is added to 500 mL of a 0.103 mol dm-3 solution of NaCN (Ka HCN = 6.2 × 10-10).
Determine the molar solubility of CuCl in a solution containing 0.050 M KCl. Ksp (CuCl) = 1.0 × 10-6. Answer A. 1.0 × 10-12 M B. 5.0 × 10-7 M C. 2.0 × 10-5 M D. 1.0 × 10-3 M E. 0.050 M
How many moles of helium gas are in a balloon if the temperature of the gas is 15.0 °C, the volume is 1.5 L and the pressure is 652 Torr
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