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A student places 2.0 moles of methylamine in 500ml of water. what is the pH? the Kb of methylamine is 4.4x10^-4.
To identify a diatomic gas (X2), a researcher carried out the following experiement. She weighed an empty 4.2L bulb, then filled it with the gas at 1.30atm and 23.0C and weighted it again. The difference in mass was 6.3 g. Identify the gas
For H3PO4, a tripotic acid, Ka1 = 7.1 × 10-3, Ka2 = 6.3 × 10-8, and Ka3 = 4.5 × 10-13. What is the pH of a solution which contains 0.200 mol of K2HPO4 and 0.300 mol of Na3PO4 per liter of solution?
What mass of this substance must evaporate in order to freeze 250 g of water initially at 15 C? (The heat of fusion of water is 334 {J/g}; the specific heat of water is 4.18 {J/g c.K}.)
Calculate the Î"S for a gas in a closed system that is an ideal monatomic gas initially at P= 5 atm, V=5L, and T = 310 K which expands to V= 10 L and its temperature is increased to 390 K
To calculate the heat of reaction between acid and base solutions using the Styrofoam calorimeter which of the following assumptions was not required?
What is the theoretical yield of hydrazine, in grams, prepared from the reaction of 150.0mL of 1.01 M NH3 (aq) with 50.0 mL of 1.25 M NaOCl (aq)?
Explain how it is that the concentrations of chloride ions in these beakers are different even though the concentrations of each substance(compound) are the same.
Determine how will this error control the final computed percentage of CH3COOH in the vinegar
If 92.00 grams of zinc combines with 58.00 grams of HCl how many grams of ZnCl2 are produced?
Aldol condensation: why must aldehyde contain none of corresponding acid? In the aldol condensation with benzaldehyde + acetone (NaOH, ethanol) --> dibenzalacetone
if 19.65mL of .145M nitric acid is required ti neutralize 50.0mL of barium hydroxide what is the molar concentration of the base? 2HNO3+Ba(OH)2-->Ba(NO3)2+2H2O
What is the partial pressure of each substance if the total pressure of the mixture is 2.35 atm?
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