Molar concentration of the ammonia
If 17.9 mL of 0.800 M~rm HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
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The wavelength of the emitted photon corresponds to the difference in energy between the two energy levels. What were the principal quantum numbers of the initial and intermediate excited states involved?
A piece of galena has a volume of 4.7 cm3. If the density of galena is 7.5 g/cm3, what is the mass (in kg) of that piece of galena?
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A sample containing 0.187 g Cl- is dissolved in 50.0 mL water. How many moles oc Cl- ion are in the solution? What is the molarity of Cl- ion in the solution?
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