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A piece of metal of mass 18 g at 117?C is placed in a calorimeter containing 48.2 g of water at 21?C. The final temperature of the mixture is 85.4?C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the surroundings.
A solution of sodium nitrate, NaNO3, in water is 5.181 molar and its density is 1.2680 g mL-1. Calculate the percent, by weight, of sodium nitrate in the solution.
do not specify stereochemistry. (The absolute stereochemical configurations of chiral substances cannot be determined from the data.)
Draw graphs representing Boyle's law, Charles's law, and Gay-Lussac's law for a fixed amount of gas. Make sure that you label each axis and state the assumptions for each law-that is, the variable(s) that is (are) held constant for each law.
Nitric acid is usually purchased in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL
What is the procedure for the extractions (to MAXIMIZE THE YIELD) and volumes? (i.e. How much water, NaCl, sodium bicarbonate and in what order)?
A 5.00 ml sample of vinegar(d=1.05g/ml and it contains acetic acid) is titrated with 17.70 ml of a 0.200M NaOH solution. What is the molarity, % acetic acid (w/w) and % acetic acid (w/v)?
How many grams of sulfur (S) are needed to react completely with 355g of mercury (Hg) to form HgS?
A gas expands and does P-V work on the surroundings equal to 345 J. At the same time, it absorbs 191 J of heat from the surroundings. Calculate the change in energy of the gas.
calculate (a)molality? (b)molarity of NaCl? (c) What is the mass/mass and remove the most loosely held e- from a gaseous atom in a ground state
Calculate the quantity of heat energy in kilocalories evolved when 75 g of liquid water forms ice at 0 0C. (heat of solidification = 80 cal/g).
An electric power station annually burns 3.6 107 kg of coal containing 1.8 percent sulfur by mass. Calculate the volume of SO2 emitted at STP.
potassiumm chlorate (KClO3) decomposes to form potassium chloride and oxygen gas. if 5.4 moles of potassium chlorate decompose, how many moles of oxygen could be produce.
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