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What is the longest wavelength of light that can be emitted by a hydrogen atom that has an initial configuration of 7p1? Give your answer accurate to three significant figures
A sample of seawater consists of water, sodium ions, chloride ions, and several other dissolved salts. These ions and salts are evenly distributed throughout the water. Which term or terms could be used to describe this sample of seawater?
A 309 mL sample of unknown HCl solution reacts completely with Na_2CO_3 to form 10.1 g CO_2. What was the concentration of the HCl solution?
What is the vapor pressure of a aqueous solution containing 10 %(by weight) ethylene glycol (62 g/mol) at 25°C. PH2O = 24.3 torr at 25°C.
How many kilojoules of energy are required to heat 50.0 g of ethanol from -20.0°C to 68.0°C?
A voltaic cell is based on the reaction Sn(s)+ I2 (s) --> Sn^2+ (aq)+ 2I^- (aq). Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 70.0 g of Sn is consumed?
Consider the reaction, 4 NH3 + 5 O2 => 4 NO + 6 H2O, How many molecules of NO will be made with 89.5 moles of H2O
The activation energy of the orginal pathway is 106 KJ/mol. What is the activation energy of the new pathway, all other factors being equal?
2.50g of KClO3 decomposes by the equation: 2KClO3=2KCl+3O2. What volume of O2 is produced at 25 degree C and a pressure of 750 mmHg
What is the enthalpy change for the neutralization reaction of 1 mol of CsOH in kJ?
What is the volume of a balloon that contains 34 moles of calcium bicarbonate?
The equilibrium constant for a reaction at 25 degrees Celsius is 4.7*10^-8. What is the change in G
The initial concentration of the reactant A in a first-order reaction is 1.2M. After 69.3 s, the concentration has fallen to 0.3M. What is the rate constant k
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