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How long would it take to count out 1 billion tiny, invisible objects (yes, invisible) from a bottle of these objects if you couldn't even see one with an optical microscope but knew that each one weighed 0.0000001 gram?
The enthalpy of vaporization of ethanol is 38.7 kJ/mol at its boiling point (78°C). Calculate the value of DeltaSsurr when 1.00 mole of ethanol is vaporized at 78.0°C and 1.00 atm
5.00 moles of ammonia are introduced into a 5.00L reactor vessel in which it partially dissociates at high temperatures. 2NH3(g)?3H2(g)+N2(g). At equilibrium at a particular temperature,
Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.)
use maxwell distribution of speeds to estimate the fraction of CO2 molecules at 300K that have speeds in the range 200 to 250 m/s.
suppose you wanted to heat a mug of water 250 ml from room temperature 25 c to 100 c to make a cup of tea. how much
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
The entropy of sublimation of a certain compound is 7.2 J / K mol at its normal sublimation point of 76 C. Calculate the vapour pressure in torr of the compound at 28 C.
Basic copper carbonate contains 57.48% copper and 5.43% carbon by mass. What mass of copper in g is contained in 7.061 kg of basic copper carbonate
Gas x effuses 0.629 times as far as oxygen under the same conditions. what is the molar mass of gas x.
a certain brand of antacid chewing gum was sent to the lab for testing and it was found to have 15 by mass of
What are the strategic importance of Neodymium uses such as magnets, coloring of glass, and infrared radiation filtering. What three reasons for the US being currently dependent upon foreign producers such as China
The molar heat of vaporization of carbon disulfide, CS2, is 28.4 kJ mol-1 at its boiling point. How many kilojoules of heat would be liberated by the condensation of 9.75 g of carbon disulfide?
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