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For an alloy that consists of 90 at% Zn and 10 at% Cu, what are the concentrations (a) of Zn (in weight percent), and (b) of Cu (in weight percent)? The atomic weights of Zn and Cu are 65.39 and 63.54 g/mol, respectively.
Using the method of successive approximations, what is [H3O+] in 0.500 M (Ka= 1.1*10^-2) and how many iterations (n) are needed to validate that a constant value had been obtained
what is the molar concentraion of the salt solution formed n this reaction? B. what is the molar concentraion of the excess reactant once this reaction has finished?
For the reaction Na2CO3(aq)+2HCl(aq)= 2NaCl(aq)+CO2(g)+H2O(l), suppose you have 100 mL of 3.80M Na2CO3. How many milliliters of 0.920 M HCl would you have to add to the sodium to consume the Na2CO3 completely
an iron nail weighing 5.10 g is allowed to react with oxygen according to the reaction below.4fe 3o2 rarr 2fe2o3a
Assuming 100% dissociation, calculate the freezing point and boiling point of 2.75 m K3PO4(aq).
If 488 g SO2 escaped into the atmosphere and all the escaped SO2 were converted to H2SO4. How many grams of H2SO4 would be produced in the atmosphere?
which is more deshielding to surrounding protons, a carbon double bonded to oxygen (a carbonyl group) or a benzyl substituent
When atoomic orbitals are hybirdized the s orbital and at least one p orbital are always hybirdized. III. to create tetrahedral structures the s orbital and all three p orbitals must be hybirdized.
a gas made up of homonuclear diatomic molecules escapes through a pinhole .533 times as fast as ne gas. write the
A sample of gas with a volume of 750 mL exerts a pressure of 98 kPa at 30 c. what pressure will the sample exert when it is compressed to 250 mL and cooled to -25 degree celsius.
Calculate the pH of the solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M HCN (Ka = 4.9 x 10-10) solution.
If a 1,2-diol is subjected to a periodic acid test, a white solid will form when silver nitrate is added. What is the identity of the white solid?
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