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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
A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.825 A) sin [(286 rad/s)t]. (a) What is the frequency of the alterna
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 2 kg block initially hangs at rest at the end of two 1-meter strings of negligible mass. A .003 kg bullet, moving horizontally with a speed of 1000 meters per second, strikes the block and becomes
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
A car starts from a rest and travels for 5s with a uniform acceleration of 1.5m/s2.the driver then applies the brakes,causing a uniform deceleration of 2.0m/s2.if the brakes are applies for 3.0s, wh
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.
A 78 kg diver steps off a 14 m tower and drops from rest straight down into the water. If he comes to rest 4.4 m beneath the surface, determine the average resistance force exerted on him by the wat
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?
A parallel plate has a capacitor of 8.6 mF with air between the plates. The capacitor is connected to a 32-V battery and charged. The battery is then removed.When a dielectric is placed between the
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).
A chair of weight 90.0 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at an angle of 35.0below the horizontal and the chair slides