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Concentrated sodium hydroxide (NaOH) is 19.4 M, has a density of 1.54 g/mL, and is a strong electrolyte. What is the molality of 19.4 M NaOH? Assume NaOH(aq) dissociates completely to produce two moles of ions per mol NaOH. Calculate the vapor pressure above concentrated NaOH at 35.0 °C, given vapor pressure of H2Ois 42.2 mm Hg at 35.0 °C.
what is the pressure exerted onto the closed end of an apparatus if the atmospheric pressure is 720 torr and the height of the water is 22.3 cm.
Calculate the amount of heat liberated (in kJ) from 293 g of mercury when it cools from 79.0°C to 14.0°C.
Calculate the number of moles in each of the following quantities.a) atoms of each element in 3.35 moles of aspirin(C9H8O4)
A balloon filled with helium gas has a volume of 500 mL at a pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm.
solar radiation is 1200 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 for solar radiation.
When the electron cloud of a molecule is easily distorted, the molecule has a high ?
What would the absorbance readings be for the acid and base forms of methyl red indicator at the acid wavelength? At the base wavelength?
A solution of I2 was standardized with ascorbic acid Using a 0..1 g sample of pure ascorbic acid, 23.52 mL of I2 were required to reach the starch end point.
the pH of a 0.20 M solution of a weak monoprotic acid is 3.70. What is the value of the ionization constant
Bomb Calorimeter, gross heat of combustion, In the following experiment 1.1651g of benzoic acid (6318 cal/gm) produced a net corrected temperature rise of 3.047C, also 8 cm (2.3 cal/cm) of fuse wire were consumed in the firing.
diluted with pure air to reduce the methane concentration to the lower flammability limit . calculate the rquire flow rate of air in mol/h and the precent by mass of oxygen in the products gas
CH3OH burns in oxygen (O2) to from carbon dioxide (CO2) and water(H2O). Equal masses of ten grams of gaseous CH3OH and O2 are placed in an evacuated flask of five litres at the temperature of 25 degrees celsius.
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