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What is the average speed of the sprinter if A sprinter set a high school record in track and field, running 200. M in 22.0s .express your answer in kilometers per hour?
Consider the combustion of ethane 2C2H6 + 7O2 yields 4CO2 + 6H2O If the ethane is burning at the rate of 0.1 mol/L*s, at what rates are CO2 and H2O being produced?
The emf of a n=1 redox cell increases by 0.124 V if the temperature rises from 25°C to 50°C. Assume that the change of entropy and enthalpy do not vary in such a range, calc
Using the Henderson-Hasselbalch equation determine the pKa for illinic acid from the following values: At pH 9.02, the concentration of illinic acid and its conjugate base
A typical cup of tea is made by starting with six fluid ounces of cold water (177 mL). How much heat (in joules) is required to heat this amount of water from 17.7 oC to 87.
Question- What is the concentration of a solution (in M) of a sodium chloride solution (NaCl) prepared by dissolving 14.4 g of (NaCl) in enough water to produce 382 mL of so
2 g of a mixture of carbonate , bicarbonate and chlorides of sodium on heating produced 56 ml of CO2 at NTP. 1.6 g of the same mixture required 25 mlof N HCl S solution for
An elemental analysis of X shows that the mass percentage composition of the compound is 26.86% C and 2.239% H, with the remainder being oxygen. A mass spectrum of X yields
The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48°C. For the process H+(aq) + OH-(aq) H2O(l), the heat of neutralization is -56.2 kJ/mol. What is
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