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explain why rutherford expected all alpha particles to go through the gold foil undisturbed.
a) If the initial sample is 8.50 g, what mass of the original iridium-192 remains after 130 days? b) Estimate the half-life of the radioisotope. c) How many days would it take for one-fourth of the sample to decay?
A sample of gas with a mass of 1.80 g occupies a volume of 921 mL at a pressure of 733 torr and a temperature of 24 C. What is the molar mass of the gas?
how many liters of C6H14(l) measured at 20 degC must be burned to provide enough heat to warm 26.9m^3 of water from 17.7 to 32.6degC .
The refining of aluminium from bauxite ore proceeds by the overall reaction: 2Al2O3 + 3C --> 4Al + 3CO2.
Magnesium oxide decomposes into magnesium and oxygen. If 12.09g of magnesium oxide decomposes to form 7.29g of magnesium, what mass of oxygen gas is also released in the reaction?
Determine the empirical formula of each of the following compounds. (Type your answer using the format CH4 for CH4 and list the elements in the same order as they are mentioned in the problem.
Calculate the mass defect and nuclear binding energy per nucleon of the each of the nuclides indicated below. A)Ti -48 (atomic mass = 47.947947 amu) mass defect = ______amu and Binding energy nucleon = ______MeV/nucleon
Calculate the equilibrium concentrations of H3O^+, A^-, and HA in a 0.040 M solution of the acid, along with the pH of the solution.
When square brackets are placed around the formula for a substance, such as [NaOH], it indicates that we are working with the percent-by-mass
Suggest at least one characteristic absorption each in the IR-spectra of 9-fluorenone and 9-hydrofluorene that could be used to distinguish between these two compounds
synthesize 3-heptanone. Use proper reagents and justify your answer with proper arrow mechanisms
If I initially have a gas at a pressure of 12 atm a volume of 23 liters, and a temerature of 200k, and then I raise the temperature to 14 atm and increase the temperature to 300k, what is the new volume of the gas ?
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