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A block of mass 0.24 kg is placed on a verti- cal spring of constant 6030 N/m and pushed downward, compressing the spring 0.09 m. After the block is released it leaves the spring and continues to tr
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
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.