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What mass of calcium nitride forms, when 31.7 g nitrogen and 57.0 g calcium gas undergo a reaction that has a 95.0% yield.
Suppose that a 10-ml graduated cylinder (in which the volumes can be read to the nearest 0.1 ml) and a 100-ml graduated cylinder are available then how will you prepare the following solutions from
An equilibrium mixture which is having N2O4, (P=0.26 atm) and NO2 (P=1.2atm) at 350 K. At the constant temperature the volume of the container is doubled.
How many millions hectares of natural forests were lost during 1990's? How many millions hectares of natural forests existed in year 2000?
Determine the numbers of grams of CuSO4*H2O are required to prepare the stock solution? A stock solution of approximately .09 M [Cu(NH)4]2+is prepared by dissolving a small quantity of CuSO4*5H2O in a
Calculate the maximum mass of K2O(s)that could be prepared from 8.04 g of K(s) and 2.28 g ofO2(g) if Potassium reacts with oxygen to make potassium oxide, K2O.
Determine the numbers of grams of Pb(NO3)2 would you need to add to 75 mL of a 2.5 M NaCl solution to precipitate out all of the Cl-?
At room temperature (25 C) a 200 ml bottle of water is placed inside a refrigerator maintained at 2 C and allowed to come to equilibrium.
Calculate the theoretical yield (g) of CaO(s) that could be prepared from 8.13 g of Ca(s) and 2.05 g of O2(g)? Calcium reacts with oxygen to make calcium oxide, CaO.
\(2cos^{2}x+5cosx+2=0\) Find out solution set of every equation in radians (for x) to four decimal places or degrees (for ) to nearest tenth as suitable.
Determine the numbers of moles of NaOH can be formed from 5.22*10-2mol of sodium metal and excess water in the reaction below
Determine the molar mass of the unknown gas in grams. An effusion container is filled with the 8 L of an unknown gas, and it takes 136 s for the gas to effuse into a vacuum.
The drink, which initially consisted of a solution that can be approximated as 100 g of solid ice at 0 C, 100 g of water at 0 C of water and 200 g of ethyl alcohol at 0 C, falls into the warm 29 C w
If an adiabatic compression of the gas from 1 atm to 3 atm results in a final temperature of 311 K, determine the maximum possible initial temperature for one mole of an ideal monatomic gas.
Determine the emf of a cell fuelled by the hydrogen and oxygen when a fuel cell develops an electric potential from the chemical reaction between reagents supplied from an outside source.
Determine the average atomic mass of M, when M2S3 is heated in the air, it is converted to MO2 and a 4.000g sample of M2S3 shows a decrease of mass of .277g when it is heated in the air.
Determine the maximum number of Cs+ ions that can be formed per joule of energy absorbed by a sample of gaseous Cs atoms?
Determine the melting point of ice under a pressure of 50 bar. Suppose that of liquid water is 1.00 g/cm3 and the density of ice under these conditions is approximately 0.92 g/cm3.
Calculate the rate constant for this reaction if a solution containing 0.2 M CH3CH2Cl and 0.05 M NaSCN reacts to give CH3CH2SCN and NaCl with an initial rate of 5* 10-9 Ms-1.
Determine the molar mass of the acid when a 3.715g sample of a monoprotic acid was dissolved in the water. It took 17.52 mL of a 0.1459 M NaOH solution to neutralize the acid.
Determine the quantity of heat produced when 3.2 g of butane is completely combusted in air and many cigarette lighters contain liquid butane (C4H10) by using the enthalpies of formation.
If the activation energy is 104kJ/mol determine the temp in degrees Celsius at which its rate constant is 8.80x10-4, the rate constant of a first-order reaction is 4.60x10-4 at 615degrees Celsius.
Assume that a reaction takes place at 325 K and 335K when the rate constant of some reaction double with every 10 degrees rise in temperature. What must the activation energy be for the rate constan
Copper is extracted from the chalcopyrite, CuFeS, ore. Determine the numbers of kilograms of a 0.862% chalcopyrite ore will be necessary to form the .00 kg of pure copper?