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How many calories are given to a household radiator when 1000 grams of 100C steam condences, and drops in temperature to 90C water?
If 0.20g of gas occupies 400 mL at 30 degrees celsius and 700 mm Hg of pressure, what is the molar mass of the gas?
How much energy is needed to raise the temperature of 16.0g of gold by 17.0degrees C, Answer in units of J
If you had a mixture of NaCl and Na2CO3, would the action of concentrated H2SO4 enable you to decide whether both Chloride ions and carbonate ions were present
A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 millicuries/mL. If the patient undergoing the test needs a dose of 10 millicuries
How many grams of dry NH4Cl need to be added to 1.80L of a 0.400M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.90? Kb for ammonia is 1.8*10^-5.
Calculate the molar mass of a gas that has a density of 143 g/mL at 23 degrees celcius and a pressue
Find the mass of sodium required to produce 5.68 L ofo hydrogen gas at STP from the reaction described by the following equation: 2Na+2H2O-->2NaOH+H2
Why did we acquire all spectra without rotationg the sample? 3) Why are Na-23 peaks shifted to lower ppm values when sodium is encapsulated by 18-crown-6 ether
Elementary mercury was first discovered when a mercury oxide was decomposed with heat, foarming mercury metal and oxygen gas. Wehn 0.24-g sample of the mercury oxide is heated, 0.189-g of mercury metal reamins.
A current of 0.0100 A is passed through a solution of rhodium sulfate, causing reduction of the metal ion to the metal. After 3.00 h, 0.038 g of Rh has been deposited. What is the charge on the rhodium ion, Rhn+? What is the formula for rhodium su..
A steel railroad bridge uses a zinc sacrificial anode to limit the extent of oxidation of the steel. If a 5.1 kg anode is completely ozidized to Zn2+ over the course of 15.5 years, compute the average current flowing through the anode.
if the radio waves transmitted by a radio station have a frequency of 70.6 Mhz, what is the wavelength of the waves, in meters?
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