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Chemistry Problem
You have a fixed container with a volume of 5.00L that contains 35.0 g nitrogen gas (N2). If the temperature is 298 K, calculate the pressure in the container. R = 0.0821 L atm / mol K.
How much heat (in kJ) is required to warm 13.0 g of ice, initially at -110.0?C? The heat capacity of ice is 2.09 J/g??C and that of steam is 2.01 J/gC
Problem- 1) If the object is closer to the lens than the focal point, the object appears to be larger with a magnification larger than 1.
A buffer solution was prepared by adding 4.95 g of sodium acetate, NaCH3CO2, to 2.50 x 10^2 mL of 0.150 M acetic acid, CH3CO2H. What is the pH of the buffer?
A diatomic gas X2 reacts with another diatomic gasY2 to form gaseous XY3
a 4.0 gram sugar cube is dissolved in a 350 milliliter teacup. what is the molarity of the sugar solution.
The half-life of plutonium-239 is 24 110 yrs. Of an original mass of 100.g, how much plutonium-239 remains after 96 440 yrs?
a chemist wants to prepare 0.50 m hcl. commercial hcl is 12.4 m. how many milliliters of the commercial acid does the
Solubility of Mg(OH)2 in water is 9.0z10^-4 g/100mL. What volume of .006 M HNO3 is required to neutralize1.0L of saturated Mg(OH)2 solution
A solution of H2SO4 (aq) with a molal concentration of 6.80 m has a density of 1.318 g/mL. What is the molar concentration of this solution
Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams.
a liter of solution contains .10 mol of Ag+ and .10 mol of Ba+2. if a highly concentrated solution of K2CrO4 is added drop by drop which will precipitate first. Ag2CrO4 or BaCrO4
A mixture of KClO3 and KCl with a mass of 0.950 g was heated to produce O2. After heating, the mass of residue was 0.700 g. Assuming all the KClO3 decomposed to KCl and O2, calculate the mass percent KClO3 in the original mixture.
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