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A 325 mL sample of solution contains 25.3 grams of CaCl2. Calculate the molar concentration of Cl- in this solution.
What is the pH at the half-stoichiometric point (half-way to the endpoint) for the titration of 0.22 M HNO2(aq) with 0.10 M KOH(aq)?
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.
Explain why cis dichloroethene has a boiling point of 60 degrees C while trans - dichloroethen has a boiling point of 48 degrees C.
Explain the structure for 4-ethyl-2,3-dimethyl-2-heptene?
A 100.0-mL buffer solution is 0.175M in HCIO and 0.150M in NaCIO .What is the pH after addition of 150.0mL of HBr?
calculate the heat released when 176g of water at 23.0 degrees celsius are converted to ice at -10.0 degrees celsius?
4 C3H5O9N3(l) → 12 CO2(g) + 6 N2(g) + O2(g) + 10 H2O(g) If a sample containing 2.01 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
If a 180mg piece of gold (density =19.32g/cm^3 ) is hammered into a sheet measuring 2.1ft x 1.0ft , what is the average thickness of the sheet in meters?
Calculate the [Cr+3] in equilibrium with Cr(OH)4-(aq) when 0.010 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at a pH of 7.3. Kf for Cr(OH)4-(aq) is 8.0 x 1029.
Assume a gasoline is isooctane, which has a density of 0.692 g/mL. What is the mass of 2.5 gal of the gasoline (1 gal = 3.78 L)? Answer in units of kg.
A gas occupying a volume of 246 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm.
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
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