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What volume of 0.2500 M cobalt(III) sulfate is required to react completely with a) 25.00 mL of 0.0315 M calcium hydroxide?
A 33.0-g sample of an alloy at 93.0°C is placed into 258 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system i
We add excess Na2CrO4 solution to 16.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.380 grams.
an auto mechanic spills 83mL of 2.6M H2SO4. How many milliliters of 1.2M of NaHCO3 must be poured on the spill to react completely with the sulfuric acid?
What is the molecular formula of a compound given the molar mass of the compound is 205.4 g/mol and the empirical formula is C3H5?
A water bath of 100.0 degrees Celsius so the liquid can vaporize it is then removed from the bath and capped. What is the mass of the 514.0 mL flask after the liquid is evaporated?
If a bottle of nail polish remover contains 151 g of acetone, how much heat would be released by its complete combustion?
Determine the element with lowest atomic number that contains a complete d subshell in the ground state element symbol only
It takes 47 mL of 0.124 M KOH to neutralize 47.8 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter
What mass of magnesium is required to produce enough gas to exert a ... exert a partial pressure of 0.50 atm in a 50.0 mL flask at a temperature of 25.0 C
A 1L flask is filled with 0.25mol N2and 0.65mol H2 at 20oC. These gases react to make NH3, heating up the flask to a temperature of 45oC. What is the final pressure of the flask?
A 6.0-g sample of [Ni(H2O)6]Cl2 is dissolved in aqueous solution. If an excess of ethylenediamine (en) is added to the solution, solid [Ni(en)3]Cl2*2H2O forms.
The specific heat of liquid bromine is 0.226 J/g-K. How much heat (J) is required to raise the temperature of 10.0 mL of bromine from 25.00C to 27.30C? The density of liquid bromine: 3.12 g/mL
IR absorption at about 3000 cm^-1. On catalytic hydrogenation, Y yields Z(C7H16) and Z is also optically active. Which is a possible structure for Y?
Suppose you find a gas volume of 115 mL at a temperature of 21.0 oC and a water vapor corrected pressure of 746 mm Hg. Use the Ideal Gas Law to calculate the moles of carbon dioxide produced.
A 347 ml sample of solution contains 5.1 g of CaCl2. Calculate the molar concentration of chloride ion in this solution.
What is the density of a block of marble that occupies 253 cm and has a mass of 752 g? Answer in units of g/cm
If 90.0 of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m. ?
Use the dipole moments of and ( HCl= 1.08, Hf= 1.82) together with the percent ionic character of each bond ( HCl= 20% ionic, HF= 45% ionic) to estimate the bond length in each molecule.
A solution is made by dissolving 3.14g of NaCl in 79.9mL of water. What is the concentration of sodium chloride in units of weight/volume percent?
The first ionization energy of bismuth is Ei1=+703 KJ/mole. What is the longest possible wavelenghth of light that could ionize an atom of bismuth?
0.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?
What is the molality of a solution prepared by dissolving 153 of in 7.95 of water at 25.0 0C. The density of water at 25.0 0C is 0.997 g/mL.
A laser pulse of light with a frequency of 7.39 × 1014 Hz contains 650 photons. Calculate the energy in J of the pulse. Express answer in scientific notation.
Which is the weakest oxidizing agent? Which is the strongest oxidizing agent? Name the elements or ions that can be reduced by Pb(s).