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As K2O dissolves in water, the oxide ion reacts with water molecules to form hydroxide ions. Write the molecular and net ionic equations for this reaction.
Give the systematic names of these compounds. Spelling counts! (a) CuI(s) (b) Fe2O3(s) (c) CoF2(s) (d) FeO(s)
Calculate the minimum energy that a bird of mass 25 g must expend in order to reach a height of 50 m.
1 some bacteria are able to harvest light of 1000 nm wavelength. a what is the energy in kilojoules of a mole of 1000
Ethanol melts at -114 C and boils at 78 C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g.K and 2.3 J/g.K, respectively.
In a gas mixture the partial pressures are nitrogen 425 torr, oxigen 115 torr, and hellium 225 torr. What is the total pressure (atm) exerted by the gas mixture?
A galvanic cell is produced as follows: Left half-cell has a Pt wire dipping into a beaker containing an equimolar mixture of Cr+2 and Cr+3 . [Cr3+ + e-??Cr+2 E°-= -0.42 V] Right hand cell has a Tl rod immersed in 1.00 M TlClO4.
Lethality of Carbon Monoxide, Sulfur Dioxide and TNT Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning:
Part A. At 25°C, another student has the following data for the aluminum cylinder. The uncertainty in mA, mB, and mcyl is 0.001 g.
How does the shape and average distance of the electrons from the nucleus compare for a 2p orbital of nitrogen and a 3p orbital of sulfur
The gas is allowed to expand against a constant external pressure of 1 bar until it reaches mechanical equilibrium. What is the final temperature of the system. How much work was obtained.
What is the airborne radioactivity concentration? Using 10 CFR 20, if the particles are composed of cobalt oxide, how many DAC does this represent?
The energy required to ionize boron is 801 kJ/mol. What minimum frequency of light is required to ionize boron?
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