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A flask contains 0.350 grams of liquid Br( bromine), . calculate the number of (Br)bromine molecules present in the flask
A calorimeter contains 19.0 grams of H2O at the temperature of 14 degree Celsius. When 1.20 grams of a substance is combined, it mixed via the reaction it is given that the substance has molar mass =57.0 temperature of the solution increases to 27.5 degree Celsius. compute the enthalpy change, , for this reaction per mole of substance .the specific heat =density of the resulting solution = those of water [4.18 and 1.00 ]
The rate law for the decomposition of ozone to molecular oxygen: 2O3(g) --> 3O2(g) and the mechanism proposed for this process is: O3 O + O2 and O + O3 --K2--> 2O2. Derive the rate law in terms of K1, K-1 and K2.
A quantity of 85.0 mL of 0.900 M HCl is mixed with 85.0 mL of 0.900 M KOH in a constant-pressure calorimeter that has a heat capacity of 325 J/°C. If the initial temperature of both solutions are the same at 18.24°C
What is defined as the number of atoms surrounding an atom in a crystal lattice and indicate how tightly the atoms
What is the reaction order with respect to each reagent for the following reaction? Then write the rate law equation.
What is the final concentration of copper in the flask b)what is the uncertainty in the value of the copper concentration?
Describe the preparation of 0.250 L of 50.0 mM lactate buffer, pH 4.5 using a 0.5 M solution of lactic acid and 0.5 M solution of sodium lactate. pka=3.9
For the reaction shown, calculate how many grams of each product form when the following amounts of reactant completely react to form products. Assume that there is more than enough of the other reactant.
If 10 g of C react with 115 g of O2 according to the equation C + O2 → CO2, how many g of O2 will remain unreacted?
Determine the pH of a solution with .12M of sodium acetate at 25 degrees C. Ka=1.8x10^-5
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added. Calculate Ka for the conjugate weak acid of CH3COO-
Titanium occurs in the magnetic mineral ilmenite (FeTiO3), which is often found mixed up with sand. The ilmenite can be separated from the sand with magnets. The titanium can then be extracted from the ilmenite by the following set of reactions
describe the hybrid orbitals used by the central atom in o3.and also determines what is the number of sigma and pi
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