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A 0.20 M solution of MgSO4 has an observed osmotic pressure of 7.6 atm at 25oC. Determine the observed van't Hoff factor for this experiment. A) 19 B) 0.31 C) 1.6 D) 1.8 E) 2.0
A sample of sodium fluoride produced 26.5 {rm g} of sodium upon decomposition. How much fluorine (in grams) was formed?
To what volume should you dilute 0.05 L of a 5.00 M KI solution so that 0.025 L of the diluted solution contains 3.25 g of KI? (Find the M of the new KI solution first, then proceed to use the M1V1
A sample consisting of 1.0 mol of a a Van der walls is compressed from 20.0dm3 to10.0 dm3 at 300K. calculate Delta H for the process.
You have at your disposal 100.0mL of 0.650M HCl and 500.0 mL of 0.300 M NaOH. How many mL of the base have to be added to the full volume of the acid to reach a pH of 1.90?
Calculate the change in entropy of the universe when 1 mol of water vapor at 100°C condenses to liquid water at 100°C in a thin flask in an ambient laboratory temperature of 25°C.
a typical person has about 200 mg of cholesterol per 100 ml of blood.if the total blood volume of an individual is 5.0 L,how many grams of total blood cholesterol does the individual contain?
The specific heat of air at normal pressure is 1.015J/g.C. What is the change in air temperature, assuming the heat from the steam is all absorbed by air?
Methane reacts with oxygen to form carbon dioxide and water as shown: CH4 + 2O2 = CO2 +2H2O. If 72 grams of water is formed, how much methane must have reacted?
The vinegar sold in the grovery stores is described as 5% v/v acetic acid. What is the mole fraction of acetic acid in this solution?
Consider the reaction, 2 Al(OH)3 + 3 H2SO4 Al2(SO4)3 + 6 H2O. How many grams of Al2(SO4)3 are generated when 152 g of H2SO4 reacts?
A sealed evacuated container made of a perfect insulating material at 22^circ C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
61.0 mL of a 1.20 M solution is diluted to a total volume of 288 mL, a 144 mL portion of that solution is diluted by adding 177 mL of water. What is the final concentration?
Suppose one green pepper has a mass of 125 grams. The pepper was homogenized with water and titrated coulmetrically (constant current) with iodine. After 15 minutes, at 70.00 mA the starch end point
Suppose you were doing work to develop a better, longer lasting lithium ion battery. Your new version has a reported Ecell voltage of 3.42 compared to the SCE reference. What would the cell potentia
A 50.0 g sample of solid ammonium carbonate is placed in a closed evacuated 3.00 L flask and heated to 400 degrees C. Calculate total pressure inside the flask at equilibrium.
A 146.6-g sample of a metal at 75.0°C is added to 146.6 g of H2O at 15.0°C. The temperature of the water rises to 17.8°C. Calculate the specific heat capacity of the metal, assuming that
Suppose that 0.290mol of methane, CH4(g), is reacted with 0.440mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much hea
If 77.0 mL of hydrogen gas is collected over water at 50.0degrees Celsius and 763 mm Hg, what is the volume of dry gas at standard conditions? The vapor pressure of water is 92.5 mm Hg at 50.0 degre
If the reaction reaches 90.0% of completion (90.0% of the limiting reactant is consumed), what are the partial pressures of each of the products in the flask at 275?
A solution of 0.312 M of KOH is used to neutralize 15.0 mL of a 0.186 M H3PO4 solution. What volume, in milliliters, of the KOH solution is required to reach the endpoint.
The data below apply to the reaction : (CH3)3CBr + H2O(CH3)3COH + HBr. Determine the order of the reaction, therate constant, and the molar concentration of (CH3)3CBr after 43.8h .
What is the molarity of each of the following solutions? You pipet 20.00 mL of 0.0600 M CuCl2 into a 100.00 mL volumetric flask and fill to the mark.
Given the decomposition of hydrogen peroxide, calculate the moles of oxygen gas produced from 5.20mol of H2O2.
One mole of an ideal gas is held at standard conditions. At what Kelvin temperature would the pressure be doubled?