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a) A sprinter set a high school record in track and field, running 200.0 in 21.2 . What is the average speed of the sprinter in kilometers per hour?
Express your answer numerically in kilometers per hour.
b) A specific brand of gourmet chocolate candy contains 7.00 of dietary fat in each 22.7- piece. How many kilograms of dietary fat are in a box containing 4.00 of candy?
Express your answer numerically in kilograms.
Calculate the pH of a 1.36x10^-2M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86.
An aqueous solution of KNO3 has a molal concentration of 1.099 mol kg-1. Its density is 1.0630 g mL-1. Calculate the molar concentration of KNO3.
A reaction mixture containing 20 mM O-acetyl serine, 50 mM NaCl, 50 mM HEPES buffer (pH 7.6), and O-acetyl serine acetylase is incubated in 37C until O-acetyl serine is completely hydrolyzed. What is the pH of the mixture at the end of the reactio..
0.65 of hydrogen chloride () is dissolved in water to make 7.5 of solution. What is the of the resulting hydrochloric acid solution
calculate the average moles of ascobic acid in the pipetted sample used for titration d)Calculate the average moles of ascobic acid in the crushed tablet.
If 5.08 x 10^ 3 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced, assuming 100% yield?2 NH3(g) 3 O2(g) 2 CH4(g) → 2 HCN(g) 6 H2O(g)
Calculate the concentration of the carbonate ion, CO3-, in a 0.010 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.
Determine whether each of the following causes an increase or decrease in the activity of the electron transport chain. 1. High NADH concentration
To the organic chemist, mass spectrometry is especially useful in the determination of the structure of a new compound because it provides information about
If a student determines that the empirical formula for a compound is HO, which molecular formula is not possible based on these info alone
Calculate the moles of Cl2 produced at equilibrium when 1.00 mol of PCl5 is heated at 250 degrees Celsius in a vessel having a capacity of 10.0 L. PCl5(g) PCl3(g) + Cl2(g) Kc = 0.041 at 250 degree celsius A) 0.64 mol B) 0.47 mol C) 0.38 mol D) 0..
Chemical Kinetics - Determine the time taken by a reactant to reach a particular concentration
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