Chemistry Questions

1. State whether each of the following statements is true or false: A A mole of H2O weighs the same as a mole of SO2 B C2H6 is a saturated organic compound. C There is more than one compound with the formula C5H12. D In chemical reactions the total number of moles of product ...continues

Heat Engine, Net Work, Waste Heat

Heat Engine, Net Work, Waste Heat. See attached file for full problem description. 6.87 only.

pH Indicators for Acids:

Procedure 1 ( click to view assignments for this procedure ) pH Indicators for Acids: 1. Take seven clean test tubes from the Glassware shelf and place them on the workbench. 2. Add 5 mL of 0.1M HCl and 5 mL of water from the Chemicals shelf to the first test tube. 3. Add 9 mL of water to the 6 remaining test tub ...continues

Bubbles and Bicarbonate

(a) A small bubble rises from the bottom of a lake, where the temperature and pressure are 8ºC and 6.4 atm, to the water’s surface, where the temperature is 25ºC and pressure is 1.0 atm. Calculate the final volume (in ml) of the bubble if its initial volume was 2.1 ml. (b)The percent by mass of bicarbonate (HCO3-) in a c ...continues

How many grams of lithium carbonate are formed by this process?

(a) Aqueous lithium hydroxide solution is used to purify air in spacecrafts and submarines because it absorbs carbon dioxide according to the equation: 2LiOH(aq) + CO2(g) -> Li2CO3(aq) + H2O(l) The pressure of CO2 in a cabin with a volume of 2.4 x 105 L is 7.9 x 10-3 atm at 312 K. A solution of LiOH of negligible volume is ...continues

Isopentane Questions

(a) The molar volume of isopentane (C5H12) is 1.00 L at 503 K and 30.0 atm. (i) Does isopentane behave like an ideal gas? Justify your answer. (ii) Given that a = 17.0 L^2.atm/mol2 and b = 0.136L/mol calculate the pressure of isopentane as predicted by the van der waals equation. (b) The elements of group 5A, the nitro ...continues

Estimate the molar heat of vaporization of a liquid whose vapor pressure doubles when the temperature is raised from 85ºC to 95ºC.

(a) Estimate the molar heat of vaporization of a liquid whose vapor pressure doubles when the temperature is raised from 85ºC to 95ºC. (b) In group 7A, the halogens, at room temperature atmospheric pressure F2 and Cl2 are gases, Br2 is a liquid and I2 is a solid. Offer an explanation why this is so.

Calculate the molar mass of geraniol.

The volatile organic compound geraniol, a component of oil of roses, is used in perfumery. It was found that the density of the vapor at 260ºC is 0.480 g/L when the pressure is 103 Torr. Calculate the molar mass of geraniol. See attached file for full problem description.

1,2,8,9,10

#1) present the full and abbreviated electronic configuration for the following: circle valence electrons on helium and sodium. Helium Nickel Chromium Sodium #2)Which is the larger species: Na or Magnesium Cu or CU+2 Tin or Antimony Bromine or Bromide ion I or I -1 #8) the specific heat of copper meta ...continues

Proteins and DNA absorb light in the 282 nm range in the spectrophotometer. what is the frequency? obtain the energy of a single photon of this wavelength?

Proteins and DNA absorb light in the 282 nm range in the spectrophotometer. what is the frequency? obtain the energy of a single photon of this wavelength?