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The equivalence point is reached when 28.38 of solution is added. What is the concentration of the unknown solution?
If 122mL mL of a 1.0M M glucose solution is diluted to 550.0mL mL , what is the molarity of the diluted solution?
If 0.00586mol N2O(g) effuses through an orifice in a certain period of time, how much NO2(g) would effuse in the same time under the same conditions?
The surface area of 100 g of glucose is much larger than that of 1 g. In no more than 100 words, explain why the solubility does not increase with the amount of solid deposited at the bottom of the
When a concentrated NaOH solution is added drop wise, Mg(OH)2 begins to precipitate first. What is the concentration of Mg2+ ions when Ca(OH)2 just begins to precipitate?
It took Abigail 62.5 cal of heat to raise the temperature of 28.8 grams of a substance from 20.0 C to 22.8 C. What is the specific heat of the substance she used?
Consider the solubility of Cu(OH)2. Determine the solubility of Cu(OH)2 in 1.0 M NaOH (aq). The Ksp is 4.8 x 10-20.
13.0 moles of gas are in a 4.00L tank at 20.1°C . Calculate the difference in pressure between methane and an ideal gas under these conditions.
How many lead atoms are in a cube of lead that has a volume of 1.82cm3 if the density of lead is 11.3 g/cm3?
A volume of 50.0 of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 13.2 of 1.50 M H2SO4 was needed.
The value of the molar absorbtivity is 7.36x103M-1cm-1 for K2CrO4 at the wavelength. What is the concentration of this chromate solution?
Light with a frequency of 7.34 × 1014 Hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light? Answer in units of nm
By adding Hg to the tube he increase the pressure on the trapped air to 2.64atm. assuming constant temperature, what is the new volume of air?
The temperature of the solution went up to 29degrees C. If calorimeter constant is 11 cal/deg C, find delta H for the solution of one mole of NaOH in H2O.
The CaC2O4-H2O precipitate is not completely air-dried when its mass is determined. Will the reported mass of the limiting reactant in the original salt mixture be reported too high or too low? Explai
Kc = 3.59 at 900 °C. For each of the following measured concentrations determine whether the reaction is at equilibrium. If not at equilibrium, in which direction will the reaction proceed to ge
How many carbon atoms are in the empirical formula? How many hydrogen atoms are in the empirical formula? How many oxygen atoms are in the empirical formula?
If 2.0 g of salicylic acid are reacted with 5.0 mL of acetic anhydride in the presence of an acid catalyst, what is the theoretical yield of aspirin in grams? (just enter a number, no units)
The density of so-called "heavy water" at 20.0C is 1.1053 g/mL. What will the mass of the flask be when filled with heavy water at 20.0OC?
Why was Benedict's solution used instead of biuret test solution to confirm the identity of sucrase obtained in the experiment?
Assume complete combustion. STP conditions can be assumed for the O2 gas consumed in this problem (1mol = 22.4 L - This equality can only be used for substances in the gaseous state).
In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 112 kJ is given off per mole of C2H4 reacting, how much heat is released when 15.7 kg of C2H6 forms?
We have an aqueous solution that contains 41% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 96 g/mol. The density of the solution is observed to be 1.2 g/mL. What is th
A piston has an external pressure of 8.00 atm. How much work has been done if the cylinder goes from a volume of 0.140 liters to 0.530 liters.
The density of mercury is 13.5 g/mL and the density of water is 1.00 g/mL. If a mercury barometer reads 755 mmHg, what is the barometric pressure in cmH2O?