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A beaker has a mass of 85.6 g when empty and 110 g when it contains 38.7 mL of pentane. What is the density of pentane?
An automobile tire is inflated with air originally at 10.0 celsius and normal atmospheric pressure. During the process, the air is compressed to 30.5% of its original volume and the temperature is increased to 45.5 celsius. (a) What is the tire pr..
The atmospheric activity of 14 C is 15 cpm/gC (counts per minute per gram of carbon). Assume that the cloth was made in the year 24 B.C. The half-life of 14 C is 5730 years. What will be the expected activity of 14 C of this sample
The activation energy of a certain reaction is 45.4kJ/mol. At 28 degrees celcius, the rate constant is 0.0150s^?1. At what temperature in degrees Celsius would this reaction go twice as fast?
How much heat energy is required to convert a 1.00 L block of ice at -40.00 degrees Celsius to steam at 250.0 degrees Celsius?
What is the molality of a solution of aluminum nitrate that contains 31.0 g of Al(NO3)3 dissolved in 295.0 g of water? Use molar masses with at least as many significant figures as the data given. What is the molality of each of the ions in soluti..
draw the major form of your drug whenph is low (acidic medium) for all acid base groups c. draw the major form of drug when ph is high (basic medium for all acid base groups
you recrystallize 300 mg of solid material and obtain 200mg. what is your percent recovery. if you concentrate some of the mother liquor and obtain a further 40 mg, what is your total percent recovery
what is the temperature change if 84 joules of heat are added to a pure gold coin with a mass of fifteen grams? it is
calculate the ph of the buffer system make up of 0.15m 0.35m nh4cl. will you explain how to solve this. step by
Four atoms of iron (Fe) are to be combined with three molecules of oxygen (O2). How many total iron atoms and oxygen molecules will be combined during the formation of Fe3O4?
A 100.0ml of sample of drinking water was buffered at PH 10.0 and after the addition of Calmagite indicator, required 35.41ml of 4.652X10^-3 m EDTA to reach the end point for the titration. Calculate the total hardness of the water in ppm of CaCO3
What if you were designing an engine for a SUV that produced 2.40 × 102 L/s of exhaust with a CO content of 1.9 mg CO per 1L of exhaust? What volume of catalytic matrix would you need to reduce the CO emission in this automobile?
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