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what is the mole fraction of magnesium chloride in a solution prepared by adding 15 grams of magnesium chloride to 82 grams of water
A 100 mm diameter silicon wafer is oxidized completely. What is the thickness of the resulting SiO2 wafer? The molecular weight of Si is 28 g/mol and of SiO2 is 60 g/mol.
What is the density in g/L of a gas mixture that contains 27% F2 and 73% He by volume at 714 mm Hg and 27.5 C.
a dry gas, held at a constant temperature, occupies a volume of 24.8 mL at 725 torr. What will be the volume of the gas at 800 torr
what is the concentration of glyceraldehyde-3-phosphate? Assume a temperature of 25.0 °C. The constant R = 8.3145 J/(mol·K)
In most amines, the nitrogen atom is hybridized, with a pyramidal structure and bond angles close to 109 . In urea, both nitrogen atoms are found to be planar
Find the pH solution & Hydronium ion concentration and What is the pH of a solution of 0.17 M acid and 0.81 M of its conjugate base if the pKa = 8.62?
Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(l) -→ 2 HNO3(l) + NO(g) If 927 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same c..
How much time is required to produce 200g of alumimun metal for molten aluminum oxide dissolved in cryolite, if you use a 12.0 amp current.
The equilibrium constant Kp for the reaction ; CCl4(g) C(s) + 2Cl2(g) at 700 celcius is 0.76 atm. Determine the initial pressure of carbon tetrachloride
A solution has a volume of 2.0 L and contains 36.0 g of glucose. If the molar mass of glucose is 180 g/mol, what is the molarity of the solution
what would be the chemical equation to this problem? In an investigation of the reaction between copper(II) ions, Cu2+, and hydrazine, N2H4, in alkaline conditions the following observations were made: 25 mL of a solution containing 25 g/L CuSO4.5..
Determine the number of representative particles in each substance.
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