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Measurements show that unknown compound X has the following composition:
element mass
chlorine 38.7%
oxygen 61.2%
Write the empirical chemical formula of X
To determine the volume of a cube, a student measures one of the dimensions of the cube several times. If the true dimension of the cube is 10.62 cm, give an example of one set of measurements that would illustrate the following:
Assuming the earth is a perfect sphere with a radius of 6371 km and an atmosphere that extends from the surface to an altitude of 20 km determine the number of metric tons of the elements/compounds+
An aqueous solution of calcium hydroxide is standardized by titration with a 0.384 M solution of hydroiodic acid. If 14.2 mL of base are required to neutralize 19.3 mL of the acid, what is the molarity of the calcium hydroxide solution
Problem- If 200 mL of oxygen and 400 mL of nitrogen, measured at one atmosphere pressure, are forced into a 100 mL container at constant temperature of 25°C, the total pressure will be
A gas sample is known to be a mixture of ethane and butane. A bulb having a 230.0-cm3 capacity is filled with the gas to a pressure of 97.5 × 103 Pa at 23.1oC. If the weight of the gas in the bulb is 0.3554 g, what is the mole percent of butane in..
Write three reactions for the oxidation of pyrite and explain how these can result in the production of acid waters that are enriched in trace metals and metalloids.
Lead(II) phosphate, Pb3(PO4)2 (s), is allowed to come to equilibrium with its ions in otherwise pure water. Ksp = 3.0 x 10?44. Calculate the equilibrium concentration of each ion.
Determine the final concentration if A 129 mL portion of that solution is diluted using water of 149 mL.
The concentration of the acid was found from the titration. PH=2.71, H+=10^-PH, Vab=25.0mL+22.03mL=47.03mL.
Styrene, C8H8, has a standard heat of combustion of -4395.2 kJ/mol. Write a balanced equation for the combustion reaction and calculate Hºf for styrene assume the products are gaseous for the calculation
An electrical motor spins at a constant 2463 rpm. If the armature radius is 6.318 cm, what is the acceleration of the edge of the motor?
If a 1.000g sample of red phosphorus powder was burned in air and reacted with oxygen gas to give 2.291g of phosphorus oxide. Compute the empirical formula as well as molecular formula of phosphorus oxide give the molar mass is approximately 282g/..
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