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1. What is the ph of a solution that results from adding 250 ml of .50 m naoh to 750 ml of .50 m hf?
2. What is the ph of a buffer composed of .035 m h2po4 and .65 m hpo4?
3. A buffer is prepared by combining 150 ml of .50 m naoh
And 250 ml of a .75 m weak acid HA. If the ph of the buffer is 5.50 what is the ka of the acid?
4. Molecules or ions that can alternitively behave as either bronsted Lowry acid or base are called?
how many moles of oxygen gas will be produced by the decomposition of 111.5 g of lead(II)oxide.
How you will protect an underground pipe line from corrosion and what are biodegradable polymers or what are conducting polymers
giving that water has a molar enthlphy of vaporization of 40.79 kJ/mol, how many grams of water could be vaporized by 623 J
A 125 g aluminum block at an initial temperature of 95°C is dropped into a styrofoam flask containing 150 mL of water at 20°C. What is the final temperature?
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate
Detremine the concentration of chromate solution - Potassium chromate has an absorbance value
The Planck distribution gives the energy in the wavelength range dA at the wavelength A. Calculate the energy density in the range 650 nm to 655 nm inside a cavity of volume
The piece of iron with a mass 102.9g was submerged in a graduated cylinder filled with water. The initial level of water was 20.0 ml. The density of iron is 7.86 g/ml.
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 & 1.8 ppm and are said to be shielded
Nitrogen reacts with a metal to form a compound in which there are three atoms of the metal for each atom of nitrogen. If 1.486 g of the metal reacts with 1.000 g of nitrogen
Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq)
Find out the required pressure to compress 180 liters of N at 1.0 atm into a tank whose volume is 34 liters.
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