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Archimedes' Principle states that when an object is immersed in a fluid, the buoyant force is equal to the weight of the fluid displaced by object. The weight of an object is equal to its mass times the acceleration due to gravity. Therefore, the weight of the fluid displaced is equal to the volume of the fluid displaced times the density of the fluid times the acceleration due to gravity.
Weight (N, newtons) - mass (kg) x g. At sea level, g = 9.81 m/s2.
A cube of lead (? = 11.3 x 103 kg/m3) is placed in a pool mercury (? = 13.6 x 103 kg/m3). The cube of lead is 3.60 x 102 cm on a side. Calculate the percentage of the cube that is above the pool of mercury.
A 9.780 g. gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen. Calculate the mass percent of ethane in the original mixture.
Consider an ideal gas with an absolute temperature of T1. To what temperature would you need to heat the gas to double its pressure?
A graduated cylinder contains 148 of water. A 17.0 piece of iron (density = 7.86 ) and a 19.0 piece of lead are added. What is the new water level in the cylinder?
Two charged dust particles exert a force of 4.7 10-2 N on each other. What will be the force if they are moved so they are only one fifth as far apart?
Equal quantities of 0.010M solutions of an acid HA and a base B are mixed. The pH of the resulting solution is 9.4. A) If Ka for HA is 9.0×10?5, what is the value of the equilibrium constant for the reaction between HA and B
when 8.00g of NaOH is added to a calorimeter filled with 75.0mL of HCl the temperature of the solution increases for 25.0 C to 33.5 C. calculate the molar heat of neutralization for the NaOH. (assume that the density of the solution is 1.00gmL)
Assume the reaction between phosphorus and chlorine gas to produce phosphorus pentachloride goes as far as possible to give the product
A 45.0 g block of aluminum initially at 28.0C absorbs 548 J of heat. What is the final temperature of the aluminum?
There are 86,472 houses in the county and the county occupies a space totaling 475 square miles. How many square miles of housing are present in Chem county?
The pH of the resulting solution is 6.35. Calculate the Ka for the acid.
How many pounds of CO2 are produced from the complete combustion of 1.00 gal of gasoline? Assume that gasoline has the formula C8H18 and has a density of 0.703g/mL.
how many grams of Lithopone will be produced in the reaction of 315 mL of 0.275 M ZnSO4 and 285 mL of 0.315 M BaS.
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