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what is the number of degree s of freedom of the system to determine the number of contributions from each cylinder to get the desired composition?
The lab assistant has prepared a 0.309 M solution of Ba(OH)2 and a 0.443M solution of HCl for you. What volume of the HCl solution will be required to exactly neutralize 10.0 mL of the BaCI2 soluti
Prove that <V> = 2 <E> and, consequently, that <K>=-<E> for a 2s electron. This relationship turns out to be true for many-electron atoms and molecules, and is a special cas
The HCL concentration in a hyperactidic stomach is 0.03 M. The volume of the liquid in the stomach is 300mL. How many tablets of the antacid (neutralization capacity of 0.008325 mol HCl neutralized
How many mmols of H2PO4- were present in the sample? Please help me solve this question. The answer is 0.18 mmols.
A sample of hydrogen gas intially at 88 degrees Celsius and 9.60 L is cooled until its final volume is 3.40L. What is its final temperature in degrees Celsius.
A hydrocarbon is commonly used as an anesthetic. If a 2.50-L flask contains 5.11 g of the hydrocarbon gas at 679 torr and 25 °C, what is the molecular formula of the hydrocarbon?
Why is it important to know and classify various chemical reactions? Please give examples of at least 3 different chemical reactions that you encounter in your daily life.
Acetic acid CH3COOH, has an acid dissociation constant of 1.8 x 10-5. What is the conjugate base of acetic acid and what is its base dissociation constant?
The Ni2+ extracted from the column was treated with 25 mL of 0.04446 M EDTA. How many milliliters of 0.02119 M Zn2+ is required for the back titration of the Ni2+ solution?
What concentration do you need to dilute this stock to, so that you have a final concentration of 5nM reagent in 1mL of cells.
The water level in the CO2 collection cylinder is higher than the water level outside the cylinder. Is the wet CO2 gas pressure greater or less than atmospheric pressure?
What is the volume occupied by 28.2g of argon gas at a pressure of 1.06atm and a temperature of 360K ?
A desktop computer is to be cooled by a fan whose flow rate is 0.34 m3/min. i) Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3.
Why does energy gap decreases in each shell as it is further away from the nucleus? Shouldn't they all have the same electron repulsion?
An experiment shows that a 115mL gas sample has a mass of 0.170g at a pressure of 711mmHg and a temperature of 34C. What is the molar mass of the gas?
Given the data below, analyze the outcome of a polymerization in each solvent -- conclude by explaining which solvent you would choose and why.
Calculate the amount of heat required to heat a 3.9kg gold bar from 30°C to 66°C. Specific heat capacity of gold is 0.128 J/g°
A solution is prepared from 0.95g of Phosphoric acid and 1.15 g of perchloric acid in 150 ml of solution. How many milliliters of 0.425 M NaOH is required to neutralize 110 ml of this acidic soluti
One spot on your plate traveled 4.3 cm when the solvent traveled 5.9 cm. What is the value of Rf for this spot?
What is the average current generated in the Cu(s)| Cu2+(aq)|| Fe3+(aq)| Fe(s) electrochemical cell if 50 g of Cu(s) are used up in a 24 hour period?
What is the molar concentration of AgNO3 in a solution if titration of 25.00 ml of the solution with 0.300M NaCL requires 37.05ml of the NaCL solution to reach the end point?
At 900 degree C, titanium tetrachloride vapour react with molten magnesium metal to form solid titanium metal and molten magnesium chloride. a). Write a balance equation for this reaction. b). what
What is the volume of propylene glycol, in gallons, needed to achieve the same antifreeze protection as 1.00 gallon of ethylene glycol.
If a pOH of 8.3 produces the best results for coagulation settling of a water, how much lime should be added to a water with an alkalinity of 255 mg/L as CaCO3 and pH of 7.5 that will be dosed with