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A16.6mL sample of a0.500M aqueousnitrous acidsolution is titrated with a0.384M aqueouspotassium hydroxidesolution. What is the pH at the start of the titration, before anypotassium hydroxidehas been added?pH =
A copper ore is 23.5% copper by mass. How many grams of copper are in 250.0 grams of this copper ore
A hydrogen atom with an electron in its ground state interacts with a photon of light with a wavelength of 1.22 × 10?6m. Could the electron make a transition from the ground state to a higher energy level
describe the underlying concepts of how laboratory activity works. descreption should be at least half page
Determine which elements are being oxidized and which elements are being reduced in each reaction
at some temperaturethe reaction is pcl5g regpcl3gcl2g. if 0.10mol of pcl5 are added to a 1-l flask and 0.020 mol of
What is the heat output of each sample? (b) One serving of each cereal is 30.0 g. How would you label the packages of the two cereals to indicate the fuel value per 30.0-g servings in joules? in nutritional calories (kilocalories)
In preparation of esters given in an experiment, the reaction product was extracted with 5% sodium bicarbonate solution (NaHCO3) in the isolation step. How? What gas was evolved during this washing step?
re-establish equilibrium conditions as described: The pressure if the system is increased by decreasing the total volume. a) shift to the left b)shift to the right c) no change
If the charge calculated in the first part of this question is passed through a cell constructed of copper electrodes immersed in an acidic solution of copper sulfate (0.5 M CuSO4/0.1 M H2SO4), what mass of copper, in mg, will be deposited on the ..
Explain what mass in grams of carbon dioxide can be produced from the reaction of 16.65 g of propane with 52.66 g of oxygen? C3H8 (g) + 5 O2 (g) 3CO2 (g) + 4H2O (g)
A 952 cm3 container of gas is exerting a pressure of 108 kPa while at a temperature of 48 oC. Calculate the pressure of this same amount of gas in a 1236 cm3 container at a temperature of 64 oC
The minimum frequency of light required to eject electrons from a metal is called the threshold frequency? Determine the minimum energy needed to eject electrons from a metal with a threshold frequency of 3.55 × 1014 s-1.
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