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If a wheelchair-marathon racer moving at 13.3 miles per hour expends energy at a rate of 635 Calories per hour, how much energy in Calories would be required to complete a marathon race (26.2 miles) at this pace
A solvent and solution are separated by a semipermeable membrane how does the height of the column of solution change if the concentration of the salt is increased?
A 355 m-L container holds .146 g of Ne and an unknown amount of Ar at 35 degrees C and a total pressure of 626 mmHg. Calculate the moles of Ar present.
Write the balanced equation for the neutralization reaction between HCl and Ba(OH)2 in aqueous solution
A portable water heater transfers 225 watts of power to 5.5 L of water. How much time will it take the water heater to heat the 5.5 L of water from 22 to 40 degrees Celsius?
For each of the following combinations of (delta H) ?H° and (delta S ) ?S° for the reaction at 25 ° C, describe whether or not the reaction will be spontaneous at 25 ° C and what will happen it the temperature is increased. Explain your descriptio..
Calculate the mole fraction of ethylene glycol in the solution.
What is the concentration (in M) of the nitrate ion when 18.4 mL of a 0.744 M solution of sodium nitrate is combined with 15.9 mL of a 0.734 M solution of copper(II) nitrate? Assume the volumes are additive.
the beaker and its contents have a total mass of 289.85 g. What volume does the beaker hold? Use ? =1.00 g/mL as the density of water. b) How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mer..
Consider a cylinder filled with air with a piston and spring arrangement on top. The external pressure is 1 bar, the initial temperature of the air in the cylinder is 25 C.
Do you think you could distinguish between 3-methylcyclohexene and methylenecyclohexane by their GC retention times?
when oxygen is in use in hospital room,no smoking signs are usually posted prominently. Explain.
Calculate delta Hvap of pure alcohol using clausius-clapeyron equation. At 19 C vapor pressure for pure alcohol is 40 torr. At 35 C vapor pressure for pure alcohol is 100 torr
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