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Titration of 25.00 mL of HCl requires 15.62 mL of 0.250 M Ba(OH)2. Determine the concentration of the HCl solution?
The atomic mass of boron is 10.81 g/mol. The two naturally occuring isotopes are B-10 with a mass of 10.0129 amu and B-11 with a mass of 11.0093 amu. Determine the percent of naturally occuring B-10.
if a plant produces 5.06 mol of C6H12O6, how many moles of CO2 are needed?
Chromium is produced by reacting its oxide with aluminum. If 76 grams of Cr2O3 and 27 grams of Al completely react to form 51 grams of Al2O3 how many grams of Cr are formed
Why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical compounds?
A mass of 46 g of solid sodium reacts with 38 g of flourine gas to produce 84 g of sodium flouride, Na F.
Calculate the amount (g) of each of the following salts that would need to be added to a 200mL volumetric flask to produce a 2 M solution of S?
a gas sample occupies 4.20 l under a pressure of 800 torr at 350K.At what temperature will it occupy 3.60 L at the same pressure?
what is the molar concentration of the salt solution formed in this reaction? What is the molar concentration of the excess reactant once this reaction has finished?
Compute the final temperature of the mixture (assuming no heat loss to the surroundings). The heat capacities of H2O(s) and H2O (l) are 2.08 and 4.18 J/g · °C, respectively, enthalpy of fusion for ice = 6.02 kJ/mol.
Nitrogen and 20% of Oxygen, and that the pressure at sea level is 1.000 atmosphere, calculate the partial pressures of each gas and the total gas pressure in the middle of the stratosphere at 35.00km altitude, where T=240.0 K.
Calculate the amount of energy in kilojoules needed to change 117g of water ice at -10degrees Celcius to steam at 125 degrees Celcius
Determine how many grams of the following solutes would be needed to make 550 mL of a 0.700 M solution.
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