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The density of lead is 11.3 g/ml . The water level in a graduated cylinder initially at 217 ml rises to 286 ml after a piece of lead is submerged. What is the mass in grams of the lead?
Engineers are designing a curved section of a highway. If the radius of curvature of the curve is 181m, at what angle should the curve be banked so that a car traveling at 29.0 m/s will stay on the
The KCl does not react under the conditions of the reaction. If 100.0 grams of the mixture produces 1.80grams of H2O, 13.80 grams of CO2, and 4.00 grams of O2, what was the composition of the origin
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8*10^-5.
Which of the following compounds is a strong electrolyte?
The equilibrium constant for the following reaction is 1.6 x 10^5 at 1024K. Find the equilibrium pressures of all gases if 10 bar of HBr is introduced into a sealed container at 1024K.
When the valve between the 2.00-L bulb, in which the gas pressure is 2.00 atm, and the 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened, what will be the final pressure in the two bulbs
The density of citronellal, a mosquito repellant, is 1.45 g · L -1 at 365?C and 50.0 kPa. What is the molar mass of citronellal?
The equation for the combustion of acetone is: 2 C3H6O + 8 O2 ---> 6 H2O + 6 CO2 + 852.6 kcal. How much heat will be given off if 0.18 mol of acetone is completely burned?
A catalyst has a avoid fraction of 0.40, an internal surface area of 180 m2/g and a pellet density of 1.40 g/cm3. Estimate the effective diffusivity of thiophene with hydrogen
A sample of ammonium phosphite, (NH4)3PO3, contains 1.32 mol of hydrogen atoms. what is the number of moles of oxygen atoms in the sample ?
Calculate the pH of a solution made by adding 69 g of sodium acetate, NaCH3COO, to 37 g of acetic acid, CH3COOH, and dissolving in water to make 200. mL of solution.
A banked circular highway curve is designed for traffic moving at 76 km/h. The radius of the curve is 166 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coeffi
The total pressure of the gases is 1.86 atm, and their temperature is 22 degrees C. How many grams of argon are there in the container?
A dockworker loading crates on a ship finds that a 17 kg crate, initially at rest on a horizontal surface, requires a 73 N horizontal force to set it in motion. However, after the crate is in motion
if 100ml of 0.1 M NaOH are reacted with 300mL of 0.2 M HBr, what is the resulting pH of this solution after the reaction has gone to completion?
The flask was then shaken until the solution was uniform. A 60.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
A reaction occurs at a rate of 2.25 10-2 moles per liter per second at 332 K. Estimate the increase in the rate of a reaction when the temperature increases to 332 K. Express the rate in moles per
A hiker starts at his camp and moves the following distances while exploring his surroundings: 75.0 m north, 2.50 x 10^2 m south. (a) find his reslutant displacement from camp. (Take east as the pos
Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Be sure your answer has the correct number of significant digits.
What is the acceleration of two falling sky divers (mass 119.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?
Calculate the partial pressure of the hydrogen gas using the atmospheric pressure and the vapor pressure of water at the temperature of the solution. Assuming ideal gas behavior, calculate the numb
An empty aerosol-spray can at room temperature (20 .C) is thrown into an incinerator where the temperature reaches 674 .C. If the gas inside the empty container was initially at a pressure of 1 atm,
What is the chemical formula for Calcium Bromate
what is the minimum amount of 6.0 M H2SO4 neccessary to produce 23.5 g of H2(g) according to the following reaction? 2Al(s) +3H2SO4(aq) --> Al2(SO4)3(aq) + 3H2(g).