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Determine if a molecule (or ion) is polar or non-polar, you must determine two factors.
1) The polarity of the individual bonds in the molecule
2) The shape of the molecule.
A gas occupies 22.4 L at STP and 14.5 L at 100°C and 2.00 atm pressure. How many moles of gas did the system gain or lose?
A 15.0--mL unknown sample of aqueous acetic acid, CH3COOH(aq), was titrated using 0.800 M NaOH. If the titration endpoint was found to be 20.0 mL.
A sample of 6.022 g of CH4 is enclosed in a 12 L container at 402 K. What is its pressure in atmospheres
At 100 ?C the vapor pressures of hexane and octane are 1836 and 354 torr, respectively. A certain liquid mixture of these two compounds has a vapor pressure of 666 torr at 100 ?C. Find the mole fractions in the liquid mixture and in the vapor phas..
write balanced half-reactions and the overall spontaneous reaction. type your answer using the format nh4 for nh4. use
Calculate the percent ionization of 0.00340 M hydrocyanic acid (Ka = 4.9e-10). % ionization = % (b) Calculate the percent ionization of 0.00340 M hydrocyanic acid in a solution containing 0.0220 M sodium cyanide. % ionization = %
A metal sulfide is 71.6% metal by mass. What is the mass fraction of the metal in the metal sulfide?
The density of magnesium oxide is 3.58 g /cm3. Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one face of the unit cell of MgO to show how the edge le..
If one cubic centimeter section of a reactor has a macroscopic fission cross section of 0.989 cm-1, and if the thermal neutron flux is 1x10^15 n/cm2 s, calculate the fission rate per cubic centimeter.
3.00 mole of Ne has a total pressure of 24.5 atm at 25 degrees C. How many moles of He are in the flask?
A researcher attempts a substitution reaction with two different reagents, water or hydroxide ion, to see which route is better. Draw the major,
calculate the probability of occupying each state when T = 50, 500, and 5000 K. As the temperature continues to increase, the probabilities will reach a limiting value. What is this limiting value
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