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A compound contains 69.94 percent iron and 30.06 percent oxygen. What is its molecular formula if the molar mass of the compound is 199.55 grams per mole?
Determine How much sodium hydroxide (in grams) is required to form 546 mL of solution with a pH of 10.00?
What volume of ethanol must be diluted with water to prepare 308 mL of 0.700 M solution?The density of ethanol is given as 0.789 g/mL.
Petroleum consumption in the US in 1990 supplied about 34.6E15 kJ of energy. Of this quantity, about 14.3E15 kJ was supplied by foreign sources.
What is the maximum number of electrons that can be identified with each of the following sets of quantum numbers? In some cases, the answer may be "none."
The manometer shown below measures the pressure of the water in the tank. Using variables for the densities (no values given), find the gage pressure at point A.
Find out How many grams of gasoline will fill a 12.5gal tank if a particular brand of gasoline has the density of 0.737 g/mL at the temperature of 25 degree Celsius?
To make a phosphate buffer at pH 9.6 starting with 1L of 10 mM phosphoric acid (H3PO4; pKs are of 2.15, 6.82, and 12.38 determine how much KOH ), you could add?
What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071.
A 1.80-L flask is filled with propane gas (C3H8), at 1.00 atm and -19.4°C. What is the mass of the propane in the flask.
When scuba diving, it is important to come back to the surface of the water from deep dives slowly. If this does not happen, then the diver can get the ?bends?.
A water skier is pulled by a net force of 135 N and has an acceleration of 1.8 m/s2. What is the mass of the skier.
Suppose your thermometer read consistently 1.0 o C lowered throughout both parts in the colligative properties lab. What effect would that have on your experimental value for the molar mass of your unknown solute?
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