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In the manufacturing of computer chips, cylinders of silicon arecut into thin wafers that are 3.00 inches in diameter and have amass of 1.50g of silicon. How thick (mm) is each wafer if silicon has a density of 2.33 g/cm3? (The volume of a cylinder is V-πr2h.)
question water at 33.0 degc is sprayed onto 0.156 kg of molten gold at 1063 degc its melting point. the water boils
Determine ΔHvap for a compound that has a measured vapor pressure 24.3 torr at 273 K and 135 torr at 325 K: 1. 34 kJ/mol, 2. 13 kJ/mol, 3. 24 kJ/mol, 4. 79 kJ/mol, 5. 41 kJ/mol
carbohydrates that comprises a balanced diet in different body types. What are the effects of the consumption of each of these on the human body.
An 1.07 mol sample of carbon dioxide gas at a temperature of 8.00 oC is found to occupy a volume of 22.7 liters. The pressure of this gas sample is
On a hot day a room air conditioner uses 1.0 kW of electrical power and works with a coefficient of performance of 2.9. How much heat does the AC remove from the room in 1 min?
A buffer solution was prepared by adding 4.95 g of sodium acetate (NaCH3CO2) to 0.250 L of 0.150 M acetic acid (Ka = 1.75 x 10-5). a. What is the pH of the buffer
in most general chemistry courses students calculate the molar mass mm of a volatile liquid using the ideal gas law pv
Nitrogen and hydrogen combine to form ammonia in the Haber process. Calculate (in kJ) the standard enthalpy change ?Hº for the reaction written below, using the bond energies given.
Calculate the heat of solution for sodium acetate when 35.0mL of water is in a calorimter and 1.5461g of sodium acetate is added. The initial temperature is 23.0 C and the final temperature is 24.8 C.
a 4.10 g nugget of pure gold absorbed 278 j of heat. what was the final temperature of the gold if the initial
A mixture of 82.49 g of aluminum (MM = 26.98 g/mol) and 117.65 g of oxygen (MM = 32.00 g/mol) is allowed to react. Identify the limiting reactant and determine the mass of the excess reactant present in the vessel when the reaction is complete.
What will be the resultant pressure when the stopcock is opened?
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