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A sled and rider with a combined weight of 60 kg are at rest on the top of a hill 12 m high.
(a) What is their total energy at the top of the hill?
(b) Assuming there is no friction, what would the total energy be on sliding halfway down the hill?
What are the concentrations of acetic acid (pKa = 4.76) and acetate in a buffer solution of 0.15 M at pH 4.5? Enter your answer to two significant figures. (For example, 0.0090 and 0.0097 each have two significant figures, whereas 0.009 has only o..
A precipitation of 0.200 mol of Pb2+ (aq) with 0.200 mol Cl- (aq) produces 24.9 g PbCl2 (s). What is the percent yield?
What is the theoretical yield of ethyl chloride in the reaction of 19.1g of ethylene with 51g of hydrogen chloride. (For ethylene: MW=28.0amu, for hydrogen chloride MW=36.5amu
When performing a mass to mass stoichiometry problem, explain why masses must be converted to moles rather than directly using the mass of reactants to predict the mass of products.
When a 5.8 g serving of cereal burns in the same bomb calorimeter, the temperatrue of the calorimeter increases by 1.92 C. Calculate the fuel value of the cereal in kj/g.
What is the percentage of copper (by mass) in copper(II) nitrate trihydrate. Cu(NO3)2 : 3H20
a compound of p and f was analyzed as follows heating 0.2324 g of the compound in a 378-cm3nbspcontainer turned all of
predict the distance between si atoms in solid silicon. how does this compare to the distance between c atoms in
an aqueous vinegar sample contains 4.4 acetic acid by mass and has a density of 1.006 gml. calculate the amount of
write the lewis structure for sef6. what is the general abx structure shape name and molecular
the differences between the two. In the experiment 1,3-dichlorobutane had a much higher percentage (46.6%) from the total products than 1,2-dichlorobutane did (23.5%).
A hydrogen atom with its electron in the n=3 energy level absorbs light with a wavelength of 1879 nm. the final energy level of the electron is
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