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Problem- Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 8.907 g sample of one such additive containing only lead, carbon and hydrogen was burned in an oxygen rich environment. The products of the combustion were 9.695 g of CO2 and 4.961 g of H2O. The sum of the subscripts in the empirical formula of the lead additive is: a. 26 b. 29 c. 30 d. 36
Please define if you can, got this question wrong on my exam, not sure if im going about it correctly
Electron affinity can be defined for molecules just as it is defined for single atoms. Write a complete chemical equation representing the electron affinity of OH. Include all relevant state symbols.
Explain what mass of ammonium chloride must be added to 2.50 L of a 0.165 M NH3 in order to gain a buffer with a pH of 9.60
what is the osmolarity of a solution containing 0.1 m nano3 and 0.2 m nacl? what is the molarity of the solution
Carbon Monoxide is a toxic pollutant found in our city air. On a particular day, the air contains 6.50mg of CO per 1.000X cubic meter of air. How many grams of CO are present in a room whose dimensions are 15.0 meters X 11.0 meters X 16.5 meters?
Why are the solubility characteristics of the sodium benzoate in a solution of aqueous base, such as sodium hydroxide, reversibly altered upon neutralizing the mixture with acid until the solution becomes acidic to Congo Red paper
Consider a galvanic (voltaic) cell that has the generic metals X and Y as electrodes. If X is more reactive than Y (that is, X more readily reacts to form a cation than Y does),
calculate the number of excess reagent units remaining when 188 PbS formula units and 279 O2 molecules react?
how many grams of metallic copper can be obtained when 54.0 grams of Aluminum react wit 319 grams of CuSO4?
A second worker approaches to within 5 meters behind a shield that attenuates 60% and remains there for 20.0 minutes. What is the ration between the absorbed doses for the two workers
What is the value of the rate constant (k) for this reaction? Points will be deducted if you do not include the correct sign and units of the rate constant. (b) Determine the half-life for this reaction in units of seconds
If a Galvanic cell (Cu and Zn) is ran to deliver current for several hours, what chemistry would occur. That is, what specific chemistry would be observed
Some atomic properties depend on the average value of 1/r rather than the average value of r itself. Evaluate the expectation value of 1/r for a hydrogenic helium 1s orbital.
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