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how many meters away is a cliff if an echo is heard one half second away? assume that sound ws traveled at 343 m/s on that day?
A boy receives 10mg of medicine for every kg he weighs. How much medicine should he receive if he weighs 48 pounds and the conversion factor for pounds to kilograms is 1 pound = 0.4536kg.
Calculate the number of 5.70m NaOH must be added to 666 ml of a buffer that contains .0205m C2H4O2 and .0260m C2H3NaO2 to increase the ph to 5.75.
How is acetyl chloride produced? If 915 gallons is produced and shipped, will DOT require the carrier to display the flammable placard? Explain your answer.
Determine How hot should be the air in a ballon be heated if it has initially a volume of 750. L at the temperature of 20 degree celsius and the final volume must be 1,000.l
A sample of gas originally at 37.2oC and 1.25 atm pressure in a 3.4 L container is allowed to expand until the pressure is 0.73 atm and the temperature is 14.9oC.
Calculate the concentration of ions in the following saturated solutions. Al3+] in Al(OH)3 solution with [OH -] = 2.6 10-9 M
63.0 mL of a 1.20 M solution is diluted to a volume of 208 mL. A 104-mL portion of that solution is diluted using 157 mL of water. What is the final concentration.
What is the theoretical yield and percent yield for this reaction under the given conditions?
A sample of oxygen occupies 10.0 L at 4.00 atm pressure. At what temperature will the pressure equal 3.00 atm if the final volume is 8.00 L.
a sample of gas occupoes 17ml at -112 degrees C. what volume does the sample occupy at 70 degrees C.
What is the pH when 100 mL of 0.1 M NH3 is titrated with 50 mL of 0.2 M HCl? pKa of NH4Br is 9.25.
A cook wants to heat 1.35 of water from 32.0 to 100.0 .If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn.
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