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A flask contains 0.430 of liquid bromine, . Determine the number of bromine molecules present in the flask
Write down the Empirical Formula if aA Compound Is 21.20% nitrogen, 6.06% Hydrogen, 24.30% sulfur , And 48.45% Oxygen?
Using a liquid sample of Na that has a molar heat of fusion of 2.06 kj/mol calculate the number of moles in a liquid sample of Na if sample releases 41.4 kj when it freezes?
Ethanol is a common laboratory solvent and has a density of 0.789 g/mL. What is the mass, in grams, of 143 mL of ethanol.
How many grams of Ca(OH)2 are needed to neutralize 3.6 moles of HCl in 655 mL of solution? The molar mass of HCl is 36.46 g/mol. The molar mass of Ca(OH)2 is 74.1 g/mol.
calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, C2H6O2 and 409 g of water.
Determine which species is present in the lowest concentration in 0.10 M H3A solution?
If a 180mg piece of gold (density =19.32g/cm^3 ) is hammered into a sheet measuring 2.1ft x 1.0ft , what is the average thickness of the sheet in meters?
A vinegar sample contained 5.20 % acetic acid. How may mL of 0.450 N sodium hydroxide would be required to titrate 25.00 mL of the vinegar sample
An electron traveling at 3.7 X 10^5 m/sec has an uncertainty in its velocity of 1.88 X 10^5 m/s. What is the uncertainty in its position?
Lucite is 71.4% carbon, 9.59% hydrogen, and 19.01% oxygen. What is the empirical formula for Lucite?
What is the percentage yield if 465 grams of hydrogen reacted with excess nitrogen and 455 grams of ammonia is formed N2 (g) + 3 H2 (g) 2NH3(g)
If 157 of wet is collected over water at 24 degrees C and a barometric pressure of 737 Torr , how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 Torr)
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