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Question- Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n = 2 to the level n = 1.
You must show your work in an efficient manner so I can understand it in clearly
A 24.9 mL volume of HCl reacts completely with 55.0 mL of aqueous Na2CO3. The reaction is as follows:2HCl (aq)+ Na2CO3(aq)-> CO2(g)+H2O(l)+2NaCl(aq)
a sodium thiosulfate na2s2o3 solution has a concentration of 0.175 m. an end point for this titration occurs when 48.94
what is the partial pressure of helium? If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon?
Calculate how much acetylene (C2H2) can be produced from 358g of H2O and an excess of CaC2 if the percent yield for this reaction is 94.5%. CaC2+2H2O----->C2H2+Ca(OH)2
To calculate the heat of reaction between acid and base solutions using the Styrofoam calorimeter which of the following assumptions was not required?
you heat a 454 gram aluminum pot to cook some mac amp cheese. if the temperaure changes from 22.0oc to 275oc and the
P and O react to form two different P oxides. The mass % of Pin one of these oxides is 43.64% in the other, it is56.34%. State the empirical formula of each P oxide.
What is the maximum amount of Cl2 that can be produced by this reaction. Calculate the amount of excess reactant.
a 25ml portion of an unknown monoprotic acid solution was titrated with 1.5 m naoh. it was found 20ml of this base was
A certain protein was found to contain 0.230 % iron by mass. Determine the minimum molecular mass of the protein.
Thermodynamics offers a way to interpret everyday occurrences. If you live in northern climates, one common familiarity is that during early winter, snow falls however then melts when it hits the ground. Both the formation as well as the melting h..
A person suffering from hyponatremia has a sodium ion concentration in the blood of 0.120 M and a total blood volume of 5L. What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.136 M
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