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What is the density of a block of marble that occupies 253 cm3 and has a mass of 752 g?
Determine the number of vacancies per cm3 in gold at 900?C, given a vacancy formation energy of 0.98 eV/atom and an Arrhenius pre-exponential factor of one
55.0 calories of heat are added to a small lead block. If the temperature of the lead increases from 27.0°C to 59.2°C, what must be the mass of the lead block?
Sodium peroxide (Na2O2) reacts with water to form sodium hydroxide and oxygen gas. Write a balanced equation for this reaction and determine how much oxygen (in grams) is formed by the complete reaction of 35.23g of Na2O2.
At 0°C a 1.00 L flask contains 6.90 10-2 mol N2, 4.40 102 mg O2, and NO at a concentration of 9.00 1018 molecules/cm3. What is the partial pressure of each gas, and what is the total pressure in the flask?
How much heat will be released if 1M and 100ml of NAOH solution reacted with 1M and 100ml of HCl solution
0.500 g of CuI was used to couple 2.0 mL of 1-hexyne what is the mole % of the CuI catalyst that was used? This is as Cu-catalyzed diazo coupling reaction that coupled ethyl diazoacetate with 1-hexyne.
We have a 0.0100 M solution of ammonium acetate (Nh4C2H3O2), an ionic compound that dissociates completely in water. The ammonium cation is a weak acid (pKa=9.24) and the acetate anion is the conjugate base of acetic acid, another weak acid (pKa=..
Researchers analyzing an unknown hydrocarbon with chemical formula CxHy found that 225 grams of O2(g) were required for complete combustion of 1.0 mol CxHy, to form CO2(g) and H2O(g) only.
Determine the boiling point of a solution that contains 78.8 g of naphthalene (C10H8) dissolved in 722 mL of benzene (d = 0.877 g/mL). Pure benzene has a boiling point of 80.1°C and a boiling point elevation constant of 2.53°C/m.
Derive an expression for (dH/dp)T soley in terms of T, p, V. Show that this quantity is identically zero for an ideal gas and find the equivalent expression for a van der Waals gas
Determine the molecular geometry of each of the following molecules
a rigid tank of 0.03cubic meters volume contains a mixture of liquid water and water vapor at 80kpa. the mass of the
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