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Drinking water in the USA cannot exceed 0.5 ppm mercury. What mass of mercury is present in 2.4 L of water at this concentration?
What is the molar concentration of mercury?
Using a phosphorus 12.39 g sample that reacts with 42.54 grams of chlorine to produce only phosphorus Trichloride (PCl3). If it is the only product, determine what mass of PCl3 is formed?
holds .35 L at 4.5 atm pressure. What is the volume when the gas is released into 1.0 atm pressure
A lactic acid/lactate ion buffer solution contains 0.31 M HC3H5O3 and 0.90 M C3H5O3-, respectively. The Ka value of lactic acid is 1.4x10^-4. Calculate the pH of this buffer.
The compound noradrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for noradrenaline?
A student measured the wavelength of hydrogen's visible red spectral line to be 647 nanometers. Which is a correct numerical setup for calculating the student's percent error.
A gas-filled balloon having a volume of 6.00 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 10-3 atm, respectively. Calculate the final v..
The following data were obtained when a Ca2+ ion-selective electrode was immersed standard solutions whose ionic strength was constant at 2.0 M.
The rare earth metal terbium is produced from terbium (III) flouride and calcium metal by a single replacement reaction. Given 27.5 g of terbium (III) flouride and 6.96 g of calcium, what is the theoretical yield (in grams) of terbium
A cylinder of Nitric Oxide has a volum of 10.0L and a pressure of 16.98 atm at 20 degrees Celcius, the number of moles of NO
2.914 gram sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 degrees celcius in a crucible until a constant mass is reached.
Describe how branched-chain fatty acids affect the fluidity of membranes and rank the following fatty acids in the order of increasing solubility in water.
A 350.0 g sample of copper is initially at 25.0 °C. It absorbs 12.50 kJ of heat from its surroundings. What is its final temperature, to the nearest tenth of a degree?
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