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The geometries of the molecules BF3 and NF3 are trigonal planar and trigonal pyramidal repectively. Which statement best accounts for the difference? a. N is more electronegative than B. b. BF3 is ionic, while NF3 is covalent. c. B utilizes sp hybridization, while N does not. d. N has a non-bonding pair of valence electrons, while B does not. [2] A sodium ion, Na+, contains the same number of electrons as a. A sodium ion, Na b. A magnesium atom, Mg c. A potassium ion, K+ d. A neon atom, Ne
Use of fossil fuels - Should we be burning the raw materials for medicine and polymers? Where will we be in 50 years on this issue?
at 1 atm, how much energy is required to heat 55.0 grams of water at -24.0 degrees Celsius to water at 157.0 degrees Celsius
Calculate the volume of a sample of carbon monoxide at -21°C and 359 torr if it occupies 3.65 L at 298 K and 758 torr.
If the silver -silver chloride electrode is replaced with a saturated calomel electrode, what is the new cell voltage?
Arrange the elements in order of decreasing ionization energy N MG O F Al
How would the observed molarity of your experiment be affected by the following circumstances. (i.e. would it be higher than the true value, lwer than the ture vaule or remain unchaged?)
calculate the wavelength of the electromagnetic radiation required to excite an electron from the ground state to the
A sample of 2.2 mol O2 (Cop,m = 29.355 J K-1 mol-1) is originally confined in 24 dm3 at 270 K and then undergoes adiabatic expansion against a constant pressure of 600 Torr until the volume has increased by a factor of 3.0.
You have 20.00 mL HCl (aq) - you are able to reach equilibrium (at pH 7.00) through titration by adding 14.25 mL of 0.2030 M NaOH. What is the Molarity of the acid
Include drawings of each of the three ph cases for phenylalanine, and be certain to include the appropriate locations of charge on your molecular structure.
a object of 50.0 grams agsilver is combined to 75.5 milliliters of nbsph2o water contained in a graduated cylinder.
c2h6g o2g co2g h2oga consider the unbalanced equation above. how many grams of o2 are required to react with 13.0 g
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