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A sample of magnesium wieghs 26.1 mg. How many moles of magnesium are there in the sample? Calculate the mass of one mole of the ionic compound that forms from strontium an dbromine.
Concentrated aqueous HClO4 has a concentration of 14.8 M. Calculate the concentrations of all ions present in a solution prepared by pipetting 4.19 mL of concentrated HClO4 into a 1000. mL volumetric flask and filling to the mark.
What is the magnitude of the change in pH when 1.8 g of NaOH is added to 1.00 L of a solution that is0.100 M in NH4Cl
What's the volume of pure hydrogen present in a sample of 55.0 mL of gas saturated with water vapour at 27 °C, if the total pressure is 104.8 kPa?
What is the origin of the charge neutrality requirement in solids? Why must solids have charge neutrality in the bulk,
What mass of acrylonitrile can be prepared from 400.0 kg of propene, 100.0 kg of ammonia, and 650.0 kg of oxygen
Draw (S)-3-hexanol, then indicate the stereochemistry of the product formed when it is treated with each of the following reagents
A sample of gas is collected over water at a temperature of 35.0?C when the barometric pressure reading is 625 torr. What is the partial pressure of the dry gas, given PH2O = 42.2 torr?
how many liters of O2 can be made from 342 g H2O2 if the density of O2 is 1.428 g/L?
Concentrated hydrochloric acid is 38% HCl by weight and has a density of 1.19 g/mL. A solution is prepared by measuring 25 mL of the concentrated HCl,
When 5.0 g of CaCl2 was dissolved in 50ml of water in a coffee cup calorimeter, the temperature of the solution rose from 22.3 C to 30.5 C. What is the q solution in Joules and what is the q rxn in Joules?
Tell me if an induced current would exist, if you had a coil and a magnetic field that both were in motion at the same time.
Why was acetone added to the reaction mixture only after we briefly mixed the catalyst and the behzaldehyde? 3. Why doesn't the dibenzalacetone product react (via the aldol condensation pathway) with the excess benzaldehyde in the reaction mixture..
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