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Assume that the density of the solution is 1.00 g/cm3. Calculate the mass percent, molarity, molality, and mole fraction of NaCl.
The decomposition of potassium chlorate (KClO3) is used as a source of oxygen in the laboratory. How much potassium chlorate is needed to produce 20.7 mol of oxygen?
According to the ideal gas law, a 10.0 mol sample of methane gas in a 0.815 L container at 503 K should exert a pressure of 506 atm. By what percent does the pressure calculated using the van der Wa
In a combustion reaction 4 moles of C8H18 react with 8 moles of O2. If the actual yield of CO2 produced is 28.16 grams, what is the percent yield?
A 350.0 mL sample of oxygen gas was collected over water at a temperature of 25.0ºC and 740.0 mm Hg. How many moles of gas were there in this sample if the vapor pressure of water at 25.0º
What is the final volume in milliliters when 0.780 of a 39.7 (m/v) solution is diluted to 25.0 (m/v)? Express your answer numerically in milliliters.
The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 11.5 g of glucose (a nonelectrolyte, MW = 180.0 g/mol)
Determine the gram-formula mass of the product of this reaction. Include proper units.
Jacob couldn't find the 6 M H2SO4, so instead substituted the 6 M HNO3 that was available. what change was most likely observed as a result of this decision?
The first billiard ball completely stops and the second one rolls away with a velocity of 4.0 m/s. Assume the first billiard ball is the system. Calculate w and q for the process.
Hydrogen gas is produced when zinc reacts with sulfuric acid: If 162 of wet is collected over water at 24 and a barometric pressure of 739 , how many grams of hydrogen have been consumed? (The
If 50 kJ of heat are given off by a chemical reaction in aqueous solution and all the heat is absorbed by the surrounding water, what are the numerical values of:
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
Calculate the pH of a solution prepared by mixing 250. mL of 0.174 m aqueous HF (density = 1.10 g/mL) with 38.7 g of an aqueous solution that is 1.50% NaOH by mass (density = 1.02 g/mL).
Vitamin C (L-ascorbic acid; MW = 176.0 g/mol) is a weak acid (pKa = 4.863). Suppose a 500.0 mg tablet is dissolved in water and titrated with 0.100 M NaOH. How many mL of NaOH are required to reach
Write an equation that shows the formation of the chloride ion from a neutral chlorine atom.
What is the molar solubility of Hg2C2O4 (Ksp = 1.75x10^-13) in 0.34M Hg2(NO3)2
Consider preparing an electrolytic cell with solid Cu & 0.40 M Cu(NO3)2 solution in one half cell and solid Ag & 0.60 M AgNO3 solution in the other half cell.
A solution is prepared by mixing 13.00mL of 0.0021M aqueous Hg2(NO3)2 with 25.00mL of 0.015M HCl. Will precipitation occur? Why?
b. If 5.50 grams of silver are produced in the above reaction, how many moles of copper were reacted?
Determine the percent yield for the reaction between 3.74g of Na and excess O2 if 5.35g of Na2O2 is recovered
How many grams of zinc metal will react with 24.5 mL of 2.0 M hydrochloric acid, HCl, forming zinc chloride (ZnCl2)? Hydrogen gas, H2, is the other product.
How many moles of lead(II)nitrate (Pb(NO3)2)will be needed to react with sodium chromate (Na2CrO4) to produce 4.62 kg of lead(II)chromate (PbCrO4)? Note NaNO3 is the other product.
How many grams of NaHCO3 do you need to put on the spill to neutralize the acid according to the following equation?