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conversion of 0.75 g of liquid water to steam at 100 celcius requires 1.7 kJ of heat. calculate the molar enthalpy of evaporation of water at 100 celcius?
Give the number of atoms of the specified element in a formula unit of each of the following compounds, and calculate the molecular (formula) mass
We add excess Na2CrO4 solution to 16.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.380 grams.
Determine how many grams of Phosphorus tri-fluoride will be produced when 40.1 g of F2 mix, and the reaction has a 78.1% yield?
A 100 mL buffer solution initially has 1.00 M HClO (Ka = 3.0 × 10-8) and 0.75 M NaClO. What is the new pH when this 100 mL of 0.10 M NaOH is added to the initial buffer solution?
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops
Concentrated acetic acid is a Class II combustible liquid. What is the molecular weight of acetic acid that will form 2 moles of CO2 assuming complete combustion?
The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr.
Prepare the molecular formula for given compounds and determine the amount of molecules present and write the molecular formula and determine how many grams of each you have
a student titrates 0.738 grams of an unknown solid, weak acid with 0.1027 Molarity NaOH. What is the molecular weight of the unknown solid, weak acid?
A gaseous mixture of O2 and Kr has a density of 1.102 g/L at 420 torr and 300. K. What is the mole percent O2 in the mixture?
slower than Friedel-Crafts alkylation of benzene and gives a mixture containing mostly o- and p-tert-butyltoluene. d. slower than Friedel-Crafts alkylation of benzene and gives mostly m-tert-butyltoluene.
Mehtanol-water solutions behave as essentially ideal solutions (the activity coefficients which measure deviation from ideality are equal to or close to one).
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