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When an ion-selective electrode for X was immersed in 0.0490 M XCl, the measured potential was 0.0470 V. What is the concentration of X when the potential is 0.0620 V? Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
When aluminum reacts with concentrated hydrochloric acid, hydrogen gas evolves. The hydrogen is collected by displacement of water at 22ºC at a total pressure of 750 torr.
What is the percent hydrogen (H) by weight of a solution containing 53.5mL of CH3COCH3? The density of acetone is 0.788 g/mL.
The molar solubility of MnCO3 is 4.2 x 10-6 M. What is Ksp for this compound?
Compounds like CCl2F2 are known as CFCs and were once widely used as refrigerants. Breaking down of these molecules in the atmosphere releases Cl atoms
The air in the balloon is then heated to 62 degree celsius, causing the balloon to expand to a volume of 4.20x10^3 m^3. What is the ratio of the number of moles of air.
what are the molar concentrations for Na+, Cl-, OH- in the resulting solution? Assume a total volume of 100 mL.
What mass of F2 is needed to produce 205 g of PF3 if the reaction has a 79.3% yield?
What mass of CO2 and H20 would be produced during the combustion analysis of 0.1674 g of the cobalamin?
The complex ion [Co(CN)6]^-3 absorbs a photon of wavelength 2.90×10^2 nm. What is the splitting energy of this complex?
the complete combustion of 1.043g of C9H8O in a bomb calorimeter( Ccal= 3.986 kj/c) produced an increase in temperature of 12.85C. Calculate the molar enthalpy of combustion of C9H8O, in kJ/mol.
H2S and H2O have simipar structures and their central atoms belong to the same group. Yet H2S is a gas at room temperature and H2O is a liquid. Use bonding principles to explain why.
what is the corresponding pressure difference between points A and B, in mmHg. At which point (A or B) is the pressure higher, and why? The temperature is 60 °F throughout
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