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An arctic weather balloon is filled with of helium gas inside a prep shed. The temperature inside the shed is . The balloon is then taken outside, where the temperature is . Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly . Be sure your answer has the correct number of significant digits
Calculate the mass of oxygen dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air
What is the pH for the solution made from 11.10 mL of 0.278 M HCl solution mixed with 70.90 mL of 0.1300 M ammonia solution ? Note that the pKa for NH4+ is 9.241
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
A 2+ ion of a particular element has an atomic mass of 203 and 123 neutrons in its nucleus, a) what is the nuclear charge in this element. Why? b) what are the symbol and name of this element? How do you know?
Finding Kc from Products' Moles, Volume and Percent Reacted, The following reaction occurs at 1600 deg. C. Calculate the equilibrium constant Kc for the reaction.
What is the chemical make-up of natural cleaners? How do these products compare to traditional cleaners? Are the active ingredients the same or different?
what volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl?
How much heat is needed to vaporize 2.42 g of liquid oxygen if the molar heat of vaporization for oxygen is 1,629 cal/mole?
What is the density of a block of marble that occupies 253 cm and has a mass of 752 g? Answer in units of g/cm
Draw all stereoisomers having molecular formula C6H12 that contain one double bond and give the IUPAC name for each compound
Considering the given equation Fe2O3 (s) + 3 CO (g) ? 2 Fe (s) + 3 CO2 (g) this is The overall reaction for the production of iron from iron ore (Iron (III) oxide) determine How many kilograms of iron are required to form 10,000 kilograms of Fe?
Lucite is 71.4% carbon, 9.59% hydrogen, and 19.01% oxygen. What is the empirical formula for Lucite?
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