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Which of the following factors affect the resolution (separation) of two compounds: (A) nature of the stationary phase; (B) eluent composition; (C) amount of sorbent used; (D) color of compounds being separated?
A) A and B
B) A, B, and C
C) B and C
D) B, C, and D
E) all these factors
A sample of vapor occupies a volume of 125 mL at 100 degrees C and 748 torr. What is the volume of the same sample under STP conditions?
Cabbage water will spoil after a few days. How might you make a cabbage indicator with a longer shelf life? According to your cabbage water, what is the pH of baking soda, crushed aspirin, cleanser, garden lime, sugar and lemon juice?
A sample of 0.2140 g of an unknown monoprotic acid was dissolved in 35.0 mL of water and titrated with 0.0950 M NaOH. The acid required 27.4 mL of base to reach the equivalence point.
A 24-kg child receives 2.85x10^6 B particles, each with an energy of 4.30x10^-13 J. If the RBE=0.40, how many millirem did the child receive?
vapor phases of water to all be in equilibrium with each other at 0.1 MPa (see equation below)? Explain in terms of Gibbs phase rule.
A large gas flask is found to weigh 143.567 g. it is then filled with gas to a pressure of 735 torr at 31 C and found to weigh 1067.9 g (the density of water is 31 C is 0.997 g/mL). Assuming that the ideal gas equation applies, calculate the molar..
In a solution of acetone and ethanol, the mole fraction of acetone is 0.40. What is the concentration of acetone as a mass percent?
In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?
The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 12.26 mL of 0.08855 M potassium permanganate (KMnO4) to reach the purple endpoint.
The concentration of styrene is lower in the toluene solution than in pure styrene so all bimolecular polymerization steps occur more slowly. d) the order of the reaction increases in toluene
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
Calculate what quantity of potassium chlorate that has molecular weight of 122.5 needed to form 33.6 litres of oxygen? Express your answer in grams and assume that temperature and pressue will be in normal condition?
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