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the atomic mass of chlorine is listed as 35.454 amu on the periodic table. it has two naturally occurring isotopes, Cl-35 and Cl-37. what are the approximate percentages of each?
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
If a 220 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.3*1.0 ft. , what is the average thickness of the sheet in meters?
The reaction AB-> A+b is second order in AB and has a rate constant of 0.0245 M^-1 S^-1 at 25.0 degree celcuis . A reaction vessel initially contains 250.0 mL of 0.108 M AB which is allowed to react to form the gaseous product.
the enthalpy of vaporization of ethanol i 43.5 kj/mole at its normal boiling point of 352 k. using avalue of the molar heat capacity of liquid ethanol of 111.46 j/k/mol
A certain gas has a volume of 200 dm3 at 27oC and 2 atmospheres of pressure. What is its volume at STP?
Calcium carbonate reacts with dilute hydrochloric acid to produce the gas carbon dioxide. Write a symbol equation for the reaction.
How much heat is required to raise the temperature of 73.5 of water from its melting point to its boiling point?
A half-cell, made by dipping a silver wire into 0.05 M aqueous AgNO, at 298 OK, develops a half-cell potential of +0.740 volts. What is the standard half-cell (Eo) for silver?
You have prepared a saturated solution of at 20 degree celcius using 31.0 of water. How much more solute can be dissolved if the temperature is increased to 30 degree celcius.
A solution is prepared by adding 60.0 mL of 0.060 M HBr to 180.0 mL of 0.70 M HI. Calculate the concentrations of all species in this solution. HBr and HI are both considered strong acids
a 40.0 ml volume of ethane gas is heated from 25.0 celcius to 50.0 celcius. If the pressure remains constant, what is the final volume?
C12H22O11(aq) + 3 O2(g) 2 H3C6H5O7(aq) + 3 H2O(l) Determine the mass of citric acid produced when 4.60 mol C12H22O11 is used.
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