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An unknown gas effuses 0.917684 times as fast as oxygen gas under the same conditions. What is the molar mass (g/mol) of the unknown gas? What is the chemical formula of the unknown gas?
The well-preserved remains of a now extinct woolly mammoth is entombed in the permafrost lands of Siberia. Scientists have conducted carbon dating experiments on plant debris found in the stomachs of this mammoth.
Write the net-ionic equation that represents the reaction that occurs when the C2H5NH2 solution is mixed with the HCl solution.
Zinc chloride (ZnCl2) is 52.02% chlorine by mass. What mass of chlorine is contained in 65.0 g of ZnCl2?Answer in units of g.How many moles of Cl is this?Answer in units of mol.
If the pressure exerted on a 100-L weather balloon changes from 1.0 atm to 2.0 atm, what would be the volume of the balloon at the higher pressure? Assume the temperature does not change and tha balloon has no leaks.
The human body contains 63% H, 25.5% O, 9.45% C, 1.35% N, 0.31% Ca, and 0.22% P, plus several elements present in smaller quantities. Are these mass or mole percents
PH of Acetylsalicylic Acid, The active ingredient in aspirin is acetylsalicylic acid (HC9H7O4), a monoprotic acid with a Ka = 3.3x10-4
the calculation of the Ksp value be affected if the endpoint of titration was surpassed (i.e. too much HCl was added)?
Conversely, what is the percent H2SO4 in a 6.0M solution of H2SO4? Density of solution = 1.84g/cm^3
A 29.0-g sample of water at 260. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Calculate the value of the activation energy for decomposation of NOCL?
Specificy which ion you would add to the unkown and how the results would identify which compound is in the unknown.
When 0.204 moles of (NH4)3PO4 in enough water to make 1.00 L of solution, what is the total concentration of all ions present in solution?
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