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This means that you used moles of NaOH to titrate moles of acetic acid in the vinegar sample or grams of acetic acid. The percent mass of your sample of vinegar was %.
What is the final temperature of the water after the preceding reaction occurs? Assume tat all the heat is used to raise the temperature of the water.
Rank the following compounds in order of decreasing vapor pressure. Rank from highest to lowest vapor pressure. To rank items as equivalent, overlap them.
Assuming that the answer to part b is "Yes", at what temperature will the crystals begin to appear when the student"s solution begins to cool? If the student cooled the solution to 0o C and filtered o
The molar mass of the substance was found to be about 300g/mol. what is the molecular formula of the unknown powder? was the substance cocaine?
Choose the answer that has the following compounds correctly arranged with respect to acid catalyzed hydrolysis. Propose a mechanism for the following reaction.
Calculate the final pessure in the container when the temperature is 110 degrees C. (Assume no oxygen remains unreacted and that all products are gaseous)
A piece of metal of mass 18 g at 104?C is placed in a calorimeter containing 53.6 g of water at 21?C. The final temperature of the mixture is 72.2?C. What is the specific heat capacity of the metal?
The coefficients in a balanced chemical equation tell how many molecules, and thus how many moles, of each reactant are needed and how many molecules, and thus moles, of each product are formed.
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
An automobile gasoline tank holds 47 kg of gasoline. When the gasoline burns, 165 kg of oxygen are consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxi
If 5.0 of nitrogen at 12 degree Celsius and 1.30 atm pressure reacts with the same volume of hydrogen at the same temperature and pressure, what volume of ammonia is obtained at that temperature and
How many charges will it need to travel from Boston, Massachusetts to Miami, Florida, a distance of 1486 mi, assuming that the trip begins with a full charge?
How many grams of magnesium chloride, MgCl2, would be required to prepare a 0.2019 m MgCl2 solution by combining this compound with 0.2050 L of water (assume a density of 1.00 g/mL)?
Empower minorities and women by thinking outside the box to develop opportunities and mechanisms for learning thus creating new wealth for the community.
Which of these ionic solids would have the largest lattice energy?
When sodium is heated, a yellow spectral line whose energy is 3.37x10^19 J/photon is produced. What is the frequency and wavelength of this light?
Calculate the molarity of an NH3 solution made up of 37.5 g of NH3 in 70.0 g of water. The density of the solution is 0.982 g/mL
A 75.0 L steel tank at 20.0C contains acetylene gas (C2H2) at a pressure of 1.39 atm. Assuming ideal gas behavior, how many grams of acetylene are in the tank?
An auto mechanic spills 90. mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 2.5 M NaHCO3 must be poured on the spill to react completely with the sulfuric acid.
The radius of a aluminum atom is 143 pm. How many aluminum atoms would have to be laid side by side to span a distance of 4.82 mm?
A reaction has Horxn = -120. KJ/mol and a forward activation energy, Ea = 80. kJ/mol. What is the activation energy for the reverse reaction? Describe the reaction as endothermic or exothermic, and re
A 64g piece of ice at 0 degrees celsius is added to a sample of water at 7 degrees celsius. All of the ice melts and the temperature of the water decreases to 0 degrees celsius How many grams of wat
What is the lewis structure for xenon tetrabromide?
calculate the molarity of acetic acid in a vinegar sample knowing that 5.00 mL of vinegar requires 43.50mL of 0.105M NaoH to just reach the phenolphtalein endpoint in a tritration.