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Which of the following is/are an atom, an isotope and an ion?
A. H+B. 2H or deuteriumC. 3H or tritiumD. H2 or hydrogen gasE. All of the choices are atoms, isotopes and ions.
what quantity of heat would be involved if 75.00g of mercury (Ar(Hg)=200.59,Ar(O)-16.00) was burned in oxygen.
Determine the percent yield if An 8.50 grams sample of Ammonia gives 12.0 g of Nitric Oxide?
Which solution would increase the osmotic pressure of water the most?
how many carbons does the sample contain
the mass of water is 92.6 grams, the initial temperature of the water is 58.9 degrees celsius, the mass of teh liquid nitrogen added to the water is 57.1 grams, and the final temperature after the liquid nitrogen has vaporized is 29.6 degrees cels..
how much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol
commercial concentrated aqueous ammonia is a solution of 28.0%, by mass, ammonia, NH3, (molar mass=17.0 g/mol) in water. the density pf the solution is .900g/mL.
A gaseous mixture of and contains 37.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 785 ?
Determine the moles of H2O lost. E. Write the empirical formula for hydrated alum, based on your experiment.
Doubling the distance between an individual and the source of radiation reduces the radiation exposure to one-fourth the original value.
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0 C,the volume of the gas is 361 mL. To what temperature must the gas be heated to occupy a volume of 492 mL.
Water self ionizes to a small extent creating equal concentrations of hydronium and hydroxide ions. What is the molar concentration of these ions in water at 25oC.
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