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The first substance to act as a superconductor above the temperature of liquid nitrogen (77 K) has the approximate formula YBa2Cu3O7. Explain what is the percent by mass of Cu in this compound? symbol "Y" is not a typo error it is actually a symbol for a genuine element.
a student placed 13.5 g of glucose c6h12o6 in a volumetric flask added enough water to dissolve the glucose by swirling
The decomposition of hydrogen peroxid is second order in H2O2. If 50 grams of 30% hydrogen peroxide is placed in a beaker within a sealed environment, what will be the concentration of hydrogen peroxide
Discuss the typical features of a calomel electrode and a silver - silver chloride electrode. What are their standard half cell potentials?
consider the dissolution of mns in water ksp 3.0 times 10-14.mnss h2ol picture mn2aq hs-aq oh-aqhow is the
Use the pKa cata to help you predict the products of the reactions. Use curved arrows to show electron flow. Predict whether the equilibrium lies to the left or to the right and calculate the equilibrium constant for the reaction.
which of the following is a property of an ionic compound?softmalleablelow boiling pointhigh melting
The volume of a sample of hydrogen is 798mL and it exerts 621mmHg pressure at 5.00C. what volume does it occupy at standard temperature and pressure.
2 Co (NO3)3 + 3 (NH4)2 S = Co2 S3 +6NH4 NO3 How many nitrogen atoms are on each side of the equation
A mixture of 0.156 moles of C is reacted with 0.117 moles of O2 in a sealed 10.0L vessel at 500.K, producing a mixture of CO and CO2. The total pressure is 0.640 atm. What is the partial pressure of CO
the water-gas shift reaction is crucial to many industrial processesh2og cog ? h2g co2gthe equilibrium constant for
Compartment A (1M NaCl) and compartment B (1 M K2SO4) are separated by a semipermeable membrane. In which compartment will the concentration of solute increase as a result of diffusion of water across the membrane
Calculate the solubility of Ni(OH)2 in a) distilled water and b) at pH of 4.0. Justify your answer. I know I need to use a mass balance ans the reaction for disolution is
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