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1. Which of the following is the same as the median score?
M. 2 nd quartile T. 25th percentile A. 6 th decile H. 75th percentile
Arrange the following compounds (H2O,H2S,BR2,NaCl) in increasing...Boiling Points:
Melting Points:
Surface Tension:
Vapor Pressure:
Viscosity
A nonionizing solid dissolved in water changed the freezing point to -2.79°C. Calculate its concentration.
What percentage of magnesium is found in magnesium oxide?
(0.33g Mg used and 0.53g of MgO formed)
An unknown element D has two stable isotopes, 185D and 187D with masses of 184.9523 amu and 186.9564 amu. The average atomic mass of element D is 186.2071 amu.
Determine the percentage abundances of the two isotopes.
A 40.0 g sample of ethanol releases 2952 J as it cools from 50.0 °C. Calculate the final temperature of the ethanol.
If it takes 640 J of heat energy to increase the temperature of 100 g of a substance by 25˚C (without changing its phase), calculate the specific heat of the substance.
An object doing work at 541 J while losing 134 J of heat, calculate the value of E.
what is the ratio of diffusion of the following:
A. Ne and Ar
B.PH3 and NH3
C.C4H10 and C2H4
Determine the concentration, to the nearest hundredth, phosphoric acid in a solution if there is 75.0 g of phosphoric acid dissolved in 60 mL of solution.
