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A mixture of Na2CO3 and NaHCO3 has a mass of 81.1g. it is dissolved in 1.00L of water and the pH is found to be 9.92. what is the mass NaHCO3 in the mixture?
Find the capacity factor for solutes with each of the following partition coefficients, K. (Note: capacity factor is also called retention factor, capacity ratio, or partition ratio.)
Using the following equation: 2AgNO3+MgBr2->2AgBr+Mg(NO3)2 calculate the moles of silver bromide and magnesium nitrate produced by 85 mol of magnesium bromide reacting with silver nitrate.
In a certain industrial process involving a heterogenous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.0cm cubed. If teh sphere were broken down into eight spheres each having a volume of 1.25cm cubed
A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 ml. The mass of the water
Steam at 3MPa and 300oC exits a boiler and goes into a high pressure turbine in which it is expanded to 300kPa. The steam is then sent back to the boiler (constant pressure heat exchanger) and reheated to 300oC.
the lead in lead pencils is actually almost pure carbon, and the mass of a period mark made by a lead pencil is about 0.0001g. How many carbon atoms are in the period.
The concepts of sensitivity and detection limit are often used interchangeably. Specify the difference between these two concepts.
Calculate q, and determine whether heat is absorbed or released when a system does work on the surroundings equal to 64 J and ?U = ?213 J.
"A sample of a particular radioisotope is placed near a Geiger counter, which is observed to register 160 counts per minute. Eight hours later the detector counts at a rate of 10 counts per minute. What is the half-life of the material?"
A particular voltaic cell operates on the reaction below, giving an emf of 0.865 V. Calculate the maximum electrical work generated when 20.0 g of zinc metal is consumed. Zn(s) + CI2(g) ? Zn2+(aq) + 2 Cl ?(aq)
what experimental variables must be controlled to assure reproducible absorbance data
A solution of ammonia and water contains 1.30×10^25 water molecules and 7.70×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
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