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Question- Suppose that a battery is allowed to supply a current of 0.5 A for 30 minutes. What charge, in coulombs, has been passed in this time?
Please provide the answer of the given question on urgent basis
you need to make a solution of cano32 for a class demonstration. first you measure a quantity of the solid cano32 by
What is the molar mass of the unknown solution containing 1.01 g of unknown in 17.74 g biphenyle froze at 42 degrees C. Pure biphenyl freezes at 71.0C
The standard enthalpy of formation of NH3 is -46 kj/mol. Use this and values for the N(triple bond)N and H-H bond energies to estimate the N-H bond energy
Question- The pH in a lake of size 3.0 km * 8.0 km and an average depth of 100 m is found to be 4.5. Calculate the mass of calcium carbonate that must be added to the lake water in order to raise its pH to 6.0.
A gaseous mixture of O2 and Kr has a density of 1.192 g/L at 305 torr and 300. K. What is the mole percent O2 in the mixture
Consider a solution resulting from the mixing of precisely 50.0 mL of 2.0 M NaOH with 50.0 mL of 2.0 M HCl. Will the mixture be corrosive and damage the skin or will it become a salt solution that is safe enough to drain down the sink.
A 100 ppm quininesulfate ( MW = 782.97 g/mol) solution was used as the standard. Assuming that your original (undiluted) sample contained 142 ppm of quinine sulfate, calculate the amount in ppm of quinine in the sample.
41.0 g of glass at 95 deg c is placed in 175 g of water at 21 deg c in an insulated container. they are allowed to come
Instead of 6 M NaOH being added to the test solution, 6 M HCl is added. How will this affect the test for the presence of ammonium ion in the solution? Explain.
Suppose you placed 0.500 mol of COBr2 in a 2.00 liter flask and heated it to 73°C. After equilibrium was reached, suppose you added an additional 2.00 mol of CO to the flask at the same temperature
Use the Ksp values to calculate the molar solubility of each of the following compounds in pure water.
Is the dissolving of calcium hydroxide in water an endothermic or exothermic process?
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