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If a 190 mg piece of gold (density =19.32 g/cm^3) is hammered into a sheet measuring 2.1*1.0 ft, what is the average thickness of the sheet in meters?
Kn1 knowledge and understanding of atomic and molecular structure, chemical bonding, chemical formulas, chemical equations, mole calculations and the mole concept and the relation between elements of the Periodic Table.
An oil bath maintained at 50.5oC loses heat to its surroundings at the rate of 4.68 kJ/min. Its temperature is maintained by an electrically heated coil with a resistance of 60 operated from a 110 V line.
A sample of chlorine, which has an average atomic mass of 35.86, consists of two isotopes with mass of 35 and 37. What is the percent (to 0.1%) abundance of the 37 isotope?
One radio station operates on an assigned frequency of 88.1 megahertz while another operates on an assigned frequency of 1460 kilohertz. What is the ratio of the larger to smaller value?
Explain why it takes longer time when anyone cook an egg in boiling water while camping at in elevation of 0.5km in the mountain than it does it home.
determine the mass of silver phosphate formed when 4.33 g of silver nitrate is reacted with 22.7 mL of .118 M K3PO4 ?
Determine why the 2s and 2p orbitals on Hydrogen are degenerate and they are not in the case of Lithium and calculate Kp at 5 degrees and enter your answer in scientific notation if delta H rxn= -128 kj/mol CH 3 OH,?
calculate the amount of heat transfered when 24.0 g of CH3OH decompose at constant pressure. delta H is 126.4 kJ
Element Z has two naturally occurring isotopes Z-79 ( 78.918 amu) and Z-81 (80.916 amu) . Calculate the atomic mass of element Z given the abundance of the Z-81 is 49.31 %
A nonelectrolyte solution adsorbs on an electrically neutral solid through a liquid. Two surfaces of this type are brought close to one another in the liquid such that they interact.
A soln. of HCl has a specific gravity of 1.120 and contains 23.81% HCl by wt. How many grams and how many milliequivalents of HCl are present in each milliliter of the soln.?
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
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