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Which of the following molecules is best described as having a nearly tetrahedral distribution of electron density?
A) BeCl2
B) OF2
C) SnCl2
D) none of these
In which of the following molecules does the carbon atom have a linear distribution of electron density?
A) C2H2
B) C2H4
C) C2H6
Which of the following is true for the molecule O=C=S?
A) it is nonpolar because it contains only double bonds
B) it is polar because the polarities of the O=C and C=S do not cancel
C) it is polar because it has a bent shape
D) it is nonpolar because it is linear
The accompanying drawing shows 4 water molecules interacting with glycine. Four dotted lines are labeled with numbers 1 through 4. As labeled by these numbers, which of the dotted lines could represent hydrogen bonds?
At 25 degrees Celsius, the reaction: H3O+ + NH3 --> NH+ + OH- is first order in each reactant, and has a rate constant of 4.3x 10^10 M^-1 s^-1
Calculate titanium's specific heat (J/g*degrees Celsius) and molar heat capacity (J/mol*degrees Celsius) if 89.7 J of heat raise the temperature of a 33.0 g titanium block by 5.20 degrees Celsius?
A gram of a salt dissolves in 4.9ml of water to from a saturated solution whose specific gravity is 1.08, how many gram of salt will be contained in 100ml of the saturated solution
A lab bench has 3 one L stoppered flasks. Flask A contains one mole of NH3 gas. Flask B contains one mole of N2 gas & Flask C contains one mole of SO2 gas. All are at the same temperature.
An enzyme reaction, in 2ml of 0.08 M of an acetate buffer, pH=4.76. During this reaction 2micromol H+ was produced
A solution consisting of 100 mL of the weak base 1.0 M NH3 is titrated with 1.0 M HCl. Which of the following is false. At the equivalence point, the solution is acidic.
In general, oxides of elements further to the left on the periodic table are basic, moving toward acidic on the right. For nonmetallic oxides, when the oxidation number of the element other than oxygen is high, the oxide tends to be acidic. When t..
How much heat is produced in burning 8 mol of CH4 under standard conditions if reactants and products are brought to 298 and H2 O(l) is formed. What is the maximum amount of useful work that can be accomplished under standard conditions by this sy..
How many electrons can be described by the quantum numbers n=7 and l=2? the answer is 10, why is this
How much water would you have to drink to meet your daily fluoride requirement of 0.5 mg.day?
How many electrons are around the central atom in the expanded valence in I3-; where the 3 is subscript and the negative sign is superscript
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