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An empty Erlenmeyer flask weighs 215.1 grams, when filled with water (d equals 1.00 grams over cm cubed). The flask and it's contents weigh 521.2 grams. What is the flask volume in scientific notation.
A particular smoke detector contains 2.85 uCI of 241Am , with a half-life of 458 . The isotope is encased in a thin aluminum container. Calculate the mass of 241Am in grams in the detector. Fears of radiation exposure from normal use of such detec..
Which of the following is the best reason as to why increasing the NaCl concentration increases the temperature at which the two strands of DNA "melt" apart
determine both the position and velocity (momentum) of an atom or subatomic particle such as an electron and thus negate the uncertainty principle? Fully explain your answer.
An ideal solution is formed from a mixture of the nonvolatile solute urea, CO(NH2)2, and methanol, CH3OH. The vapor pressure of pure methanol at 20°C is 89 mmHg. If 4.9 g of urea is mixed with 31.0 g of methanol, calculate the vapor pressure of th..
explain how le chateliers principle affects the extent of the dissociation of acetic acid in a buffer that is 0.10 m
A sample of ethanol (C2H5OH) has a mass of 43.8 g.(a) How many carbon atoms does the sample contain?
The gasoline tank of an automobile contains 83 kg of gasoline. The gasoline combines with 332.0 kg of oxygen. What is the total combined mass of the carbon dioxide and water produced by combustion in the engine
What color light would you expect to have a wavelength of 550 nm. Explain your reasoning. As the reaction mixture cools, would you expect the absorbance at 550 nm to increase or decrease. Explain.
How much PV work is done if 88.0 grams of C 2H 4 ethylene and 120 grams of hydrochloric acid HCl are permitted to react at atmospheric pressure and the volume change = -70.3 Litres?
A mass of solid aluminum is at its melting point. what is the maximum mass of this sample that can be melted by 120 kJ of heat? ( Cp=0.900J/gc ; Hfus= 35.7 KJ/g
306 mL of a .208 M solution of silver nitrate will react with 146mL of a .170 M solution of sodium phosphate to produce how many grams of silver phosphate precipitate?
A reaction has a rate constant of 1.27×10?4/s at 29 degrees C and 0.234/s at 79 degrees C. A) Determine the activation barrier for the reaction. B) What is the value of the rate constant at 15
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