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Calculate the mass of propylene glycol that must be added to .360 kg of water to reduce the vapor pressure by 2.87 torr at 40 degrees celsius (Ph20 at 40 degrees = 55.3)
a.) Available Electrons (AE) b.) Needed Electrons (NE) c.) Geometry Description d.) Number of sigma bonds e.) bonding description f.) lewis dot structure
The water level in a graduated cylinder initially at 223 mL rises to 282 mL after a piece of lead is submerged. What is the mass in grams of the lead?
A solution is prepared by dissolving 396 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
How many grams of dry NH_4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}.
What independent equations/relations can you write for thisprocess? What is the flow rate of the inlet water stream? (Inkg/hour)
For lab this week i need to separate a mixture of caffeine and Phenacetin using Acid-BAse Extraction. What reagent should i use for the separation of components by extraction of the dichloro methane layer
The solubility of MX2 is 8.91e-07 M. What is its Ksp to three sig figs? What is the molar solubility of M2X (Ksp = 1.38e-10)? M What is the concentration of M1+ in a saturated solution of M2X? M
Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one cubic centimeter of mercury?
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes
You are titrating 150.0 mL of 0.070 M Ca2 with 0.070 M EDTA at pH 9.00. Log Kf for the Ca2 -EDTA complex is 10.65, and the fraction of free EDTA in the Y4- form, ?Y4-, is 0.041 at pH 9.00. Calculate the concentration of Ca2 at V = 1/2 Ve. Calculate..
An unknown compound contains only carbon, hydrogen, and oxygen (C_x,H_y,O_z). Combustion of 4.50 g of this compound produced 6.60 of carbon dioxide and 2.70 of water. How many moles of carbon,C , were in the original sample
The molar solubility of calcium phosphate. b) The molar concentration of calcium ions at equilibrium. c) The molar concentration of phosphate ions at equilibrium.
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