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What is the total mass of the Earth's atmosphere? How does this compare to the mass of the Earth?
the maximum velocity of the ejected electrons is 3.45 multiplied by 105 m/s. Calculate the binding energy of electrons to the magnesium surface.
What is the percent yield of lithium nitride if 76.8 g of lithium nitride is recovered from reacting 56.0 g of nitrogen gas with 56.90 g of lithium metal?
Write one overall equation, using an alkali metal ion and a nitrate ion as spectator ions if needed, for the following net ionic equation: H+(aq) + OH-(aq) ? H2O(l)
6HF + SiO2 => H2SiF6 + 2H2O Delta Hrxn = -670kJ/mol, What is the enthalpy change if the feed into a reactor contains 3 mol HF and 1.5 mol SiO2
a sample of hydrogen gas initially at 29C and 7.0 L iscooled until its final volume is 2.9 L. What is its final temperature
A 23.45g piece of iron and a 29.95g piece of gold at 100.00C were dropped into 530ml of water at 16.05C. The molar heat capacities of iron and gold are 25.19 (j/mol x C) and 25.41 j/(mol x C). respectively. What is the final temperature of water a..
A solution is 21.0% ethylene glycol (C2H6O2) solution in water with density of 1.02g/mL. WHat is the molarity?
Liquid-in-glass thermometer are of two types:mercury in glass and alcohol plus red dye in glass. the dependence of volume on temperature of mercury and alcohol.
Calculate the partial pressure of ozone and the number of ozone molecules per liter of air if the temperature and pressure were 20.0 °C and 758 mmHg, respectively.
Combustion of solid urea: CO(NH2)2 (s) + 3/2 O2 (g) --> CO2 (g) + N2 (g) + 2H2O According to bomb calorimetry measurements
Determine the linear and volume shrinkages that occur during the drying and sintering of a gel containing 5 vol% solids if the dried gel and the sintered gel have a solids content (relative density) of 50% and 100%, respectively
What wavelength (in s-1) of light would be required to change the vibrational number from n=0 to n=4, assuming O-H acts as a harmonic oscillator?
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