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If an iron scoopula, instead of a plastic one, is used to add unknown metal to HCl solution, will it affect the calculated molar mass of the unknown metal?
Which of the following species are amphiprotic in aqueous solution? For such a species, write one equation showing it acting as an acid, and another equation showing it acting as a base. OH¯, NH4+, H2O, HS¯, NO2?, HCO3?, HBr
Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET). The half-life of nitrogen-13 is 10.0 minutes. How much time is required for the activity of a sample of nitrogen-13 to fall to 14.2 percent of its..
An element has three naturally occurring isotopes, calculate the percent abundance and the atomic mass
What is the molar concentration of Na+ ions in 0.035 M solutions of the following sodium salts in water
If you dissolved 0.95g of salt in 100ml distilled water, what is the concentration of salt in this solution, in % wt/vol
an unknown salt is either naf nacl or naocl.when 0.050 mol of the salt is dissolved in water for form 0.500 l of
The molar heat of reaction, H rxn, for the reaction of Ca(s) + 2H+(aq) Ca2+(aq) + H2(g)
What mass of NaOH (s) must be added to 1.0 L of 0.050 M NH3 to ensure that the percent ionization of NH3 is no greater than 0.0010%? Assume no volume change on addition of NaOH.
carbon monoxide will burn in air to produce co2 according to the following equation 2 co g o2 g yields 2 co2 what
Why do you think we need to convert the calcium carbonate to calcium chloride befoe we do our EDTA titrations? What specific condition in our titrations require this?
Explain why the Rf values changed when the eluant was changed from 100% petroleum ether to a 95:5 mixture of petroleum ether-ethyl acetate. Why UV light is not a useful visualization technique in every circumstances?
When carbon dioxide is bubbled through a clear calcium hydroxide solution, the solution appears milky. write an equation for the reaction and explain how this reaction illustrates that CO2 is an acidic oxide. Remember to add the states of all reac..
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