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a- The normal boiling point of water (delta H vap = 40.7 kJ/mol) is 100c. At the summit of mount Everest the boiling point of water is 70 c. Calculate the pressure in (torr) at the summit of Mount Ev.
b- gold has a face centered cubic unit cell. The atomic radius of gold is 153pm. Calculate the density.
What is the molarity of an aqueous solution containing 75.3 g of glucose (C6H12O6, mol wt = 180 g/mole) in 35.5 mL of solution
Explain why the Rf values changed when the eluant was changed from 100% petroleum ether to a 95:5 mixture of petroleum ether-ethyl acetate.
A solution that has a K+ concentration of 5.00ppm is to be prepared from solid KCl. Assuming a solution density of1.000g/mL how many miligrams of KCl must be added to make 1.00L solution?
Every 100.00 g of the compound SiH4 contains 87.45 g of Si and 12.55 g of H. Find the ratio of the atomic mass of S to the atomic mass of H.
The metal used to make the US nickel coin is an alloy of 75% copper and 25% nickel. What maximum mass of alloy could be produced if only 450 kg of nickel and 1180 kg of copper were on hand?
When a system is in a state of chemical equilibrium, a state of apparent rest, is anything going on at the molecular
what volume(in mL) of 0.0887 M MgF2 solution is needed to make 275.0mL of 0.0224 M MgF2 solution.
If 45.4g of H2O are produced in the reaction given below, the number of grams of magnesium carbonate used is.?
Energy level of electrons in atoms - The 3s level in hydrogen has a lower energy than the3d level in hydrogen.
followed by acidification, gives compound Z with molecular formula C4H6O4, CH3CO2H and CO2. Both X and Y are optically active, while Z is optically inactive. Propose structures for X, Y and Z that are consistent with these data.
A generic salt, AB, has a molar mass of 243 g/mol and a solubility of 8.90 g/L at 25 C what is the Ksp of this salt
Calculate the pH of the buffer if 10 drops of 0.1mol/L of NaCH3COO is added to 10 drops of 0.1 mol/L of CH3COOH. Equations useful to obtain the solution
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