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A solution is made by dissolving 25.7 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution. Calculate the pH of the final solution. Report pH to 2 decimal places.
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2 and 12.0 g of He at 14°C is in a 50.0-L container. What is the total pressure in the vessel.
If the heat of combustion for a specific compound is -1360.0 kJ/mol and its molar mass is 82.03 g/mol, how many grams of this compound must
Electrolysis of molten MgCl2 is the final production step in the isolation of magnesium from seawater by the Dow process.
How many grams of NaCl are contained in 350 ml of a 0.25 M solution of sodium chloride?
The combustion of ethanol, C2H6O (MW = 46.0 g/mol), produces CO2 (MW = 44.0 g/mol) and water (18.0 g/mol). In a lab experiment, the reaction occurs using 4.60 g of ethanol in a 1.00 L container at body temperature (310 K) and 0.970 atm according t..
calculate the initial reaction rate when [O3] & [NO] remain essentially constant at the values [O3]0= 7.48 x 10-6 M & [NO]0= 3.26 x 10-5M
Given the following peptide: MPFITCYRVE What is the net charge on this peptide at pH 3 and pH 11. Use the pK values for the individual amino acids in Table 4.1. Estimate the pI (isoelectric point) for this peptide.
sample of amygdalin yields alpha hydroxyphenylacetic acid that consists of 70% of the R isomer and 30% of its enantiomer. What is the specific rotation of this mixture? The specific roation of pure (R)-alpha-hydroxyphenylacetic is -154.
Calculate the molar density at this pressure at 310. What fraction of the gas phase molecules initially present for 1.0 in the chamber are present at
The vapor pressure of pure water at 25C is 23.8 torr. A solution is made by mixing 18.52g of an unknown non-ionic substance into 200.00g of water and the vapor pressure of the solution is found to be 23.3 torr. What is the molecular weight of the ..
A 295 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
An unknown compound with a molecular formula of C8H18 reacts with chlorine in the presence of light and heat. From the reaction, only one compound with the formula C8H17Cl can be isolated. What is the structure of the original unknown compound?
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