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A sample of 225 g of silicon tetrachoride is reacted with an excess (more than necessary) amout of Mg. How many moles of Si are produced?
What is partial pressure of O2 in atmospheres? What is the partial pressure of Ne in atmospheres?
A solution contains 0.10 M of iodide ion I-, and 0.10 M Carbonate ion CO3 2-. If solid Pb(NO3)2 is slowly added to the solution, which salt would precipitate first, PbI2 or PbCO3
Ag electrode in 1.0 M Ag + (aq) and Cu electrode in 1.0 M Cu 2+ (aq). What is the cell potential when the solutions are altered, so [Ag+] = 1.25 M and [Cu 2+] =0.25 M
What volume (mL) of a concentrated solution of NaOH (6.00 M) must be diluted to 200. mL to make a 0.88 M NaOH solution
exactly 10.0 ml of an unknown sample of ni2 gave a current of 2.36 ?a. after 0.500 ml solution of 0.0287 m ni2 was
After a disturbance, the system regains equilibrium with a total pressure of 2.0atm. What is the partial pressure of A at the new equilibrium
a sample of aluminum chloride increased in temperature by 3.5 k when the sample absorbed 167 j of energy. determine the
The element mercury, chemical symbol Hg, has an atomic number of 80. How many protons, electrons and neutrons does an atom of Mercury contain
when carbon dioxide dissolves in water carbonic acid h2co3 is formed. when this enters limestone caco3 it dissolves the
Detailed analysis of the 369 and 295 cm-1 bands show them to arise from totally symmetric modes. Show that the Raman spectrum is consistent with a trigonal-bipyramidal geometry.
The heat capacity of liquid water is 4.18 J/g·°C and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 1.00 g of liquid water at 67°C into 1.00 g of steam at 100°C
which of the following chemical combinations of the elements would be most exothermic, Na and Cl
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