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This is placed in contact with a semipermeable membrane and the water level rises by 26.3 cm. What is the molar mass of the protein?
The vapor pressure of pure ethyl bromide at this temperature is 400.0 torr. Use Raoult's law to determine the molar mass of the compound.
Rate constants for the reaction NO2(g) + CO(g) -----> NO(g) + CO2(g) are 1.31 M-1s-1 at 700. K and23.0 M-1s-1 at 800. K.
X with seven electron dots around it, Y with six electron dots, and Z with five electron dots. To which groups in the periodic table would each element belong?
Briefly differentiate between solvent extraction and chromatography. What roles do these two techniques play in analytical chemistry?
What are the different chemical and physical properities on the basis of what you would view in a series of chemical reactions with the copper reactions?
Based off of pka values of 10 for phenol and 6.4 for carbonic acid, would sodium bicarbonate be a suitable base for separating phenol from a neutral organic compound via aqueous extraction?
A solution of 2.50g of a compound having the empirical formula C6H5P in 25.0 g of benzene is observed to freeze at 4.3C. Calculate the molar mass of the solute and its molecular formula.
A solution has 41.7% transmittance in a cell with a pathlength of 1.00 cm. If the material responsible for the absorptionof light has a molar absorptivity = 738(L/mole- cm) at thewavelength used, c
The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce methanol (CH3OH) and hydrochloric acid (HCl) is 3.32 10-10s-1 at 25 degrees C.
A volume of 6.55 mL of the NaOH solution was required to reach the endpoint. What is the concentration of the unknown H3PO4 solution?
The temperature inside a balloon is raised from 25.0 °C to 250.0 °C. If the volume of cold air was 10.0 L, what is the volume of hot air?
The oxidation of copper 1 oxide, Cu2O (s) to copper 2 oxide, CuO (s) is an exothermic process: Calculate the energy released as heat when 25.0 grams of Cu2O (s) undergo oxidation at constant pressure.
What is the impact of a catalyst on the rate and equilibrium of a general chemical reaction?
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using
How does the collision theory account for the dependance of rate on the concentration of the reactants?
Calculate the mass in kg of 1 atom of silver with three significant figures. How many atoms of oxygen are present in 2.43 g of O2 ?
At the same conditions, ice has a density of .917 g/cm^3. How much work is done at these conditions by 1 kg of ice as it melts to liquid water?
A sample of water with a mass of 23.31g and an initial temperature of 367.67K loses 8615 Joules. What is the final temperature?
If the sulfuric acid is 95.0% H2SO4 by mass and has a density of 1.84 g/ml, how many kilograms of sodium carbonate must be added to neutralize the acid?
What are the boiling point. and freezing point of a 2.47 molal solution of naphthalene in benzene? The boiling point and freezing point are 80.1 C and 5.5 C respectively.
What is the freezing point of an cyclohexane solution that boils at 81.27 degrees C? Normal freezing point is 6.5 and the normal boiling point is 80.7 degrees C. Kfp = 20.1 K/m and Kbp = 2.79 K/m.
Cadaverine, a foul smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H, and 27.40% N by mass; its molar mass is 102.2 g/mol. What is the empirical and molecula
Calculate the pressure that must be applied to achieve reverse osmosis of 0.504 M NaCl separated by a semipermeable membrane from a solution that is 0.0020 M in NaCl at 22 deg Celsius.
What is the slope of an Arrhenius plot for the following reaction?