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A fixed quantity of gas at 21 C exhibits a pressure of 752 torr and occupies a volume of 5.12 L. a) Calculate the volume the gas will occupy if the pressure is increased to 1.88 atm while the temperature is held constant
The average concentration of calcium ion in seawater is 412 mg of calcium ion per kg of seawater. What is the molarity of the calcium ion if the density of the seawater is 1.025 g/mL?
What is the theoretical amount of water (MW 18.02 g/mol), in grams, that could form when 26.67 grams of aluminum oxide (MW 101.96 g/mol) reacts with excess hydrogen gas
How much energy is required to boil 45.5g of water at 100 degrees C at sea level? The molar heat of vaporization of water is 40.6 kJ/mol.
A solution of phosphoric acid was made by dissolving 10.0g H2PO4 in 10.0 mL of water. The resulting volume was 104 mL. Calculate density, mole fraction, molarity, and molality of the solution.
Calculate the average absorbance and use this value for an absorbance point on your graph. Use the printed graph from above, find the average Absorbance of the unknown on the y-axis
a separatory funnel is used in this method of separating liquids . f. liquid is allowed to evaporate, leaving the solid behind c. element
What mass of CCl4 will be formed if 1.20 moles of methane react with 1.55 moles of chlorine?
How much of a 6.0 M sucrose solution should be used to make 79.0 mL of a 0.055 M solution.
Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance 78.99%), 25Mg (isotopic mass = 24.9858 amu, abundance 10.00%), and 26Mg (isotopic mass = 25.9826 amu, abundance 11.01%)
Consider the following reaction, where X represents and unknown element. 6X(s) + 2B2O3(s0 = B4X3(s) + 3XO2(g) If 165 grams of X reacts completely with diboron trioxide to rproduce 2.29 mol of B4X3.
Quantum number representations - What are the possible values of the four quantum numbers for one electron in a 5d orbital?
Historically, the solid residue that is left after the Dichloromethane -or methylene chloride (CH2Cl2 )solution is evaporated has a lower melting point that its literature value, due to impurities.
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