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November 24, 2014

Search: CHEMISTRYYY

Number of results: 10

chemistryyy
what are metallic bonds?
October 24, 2010 by Anonymous

CHEMISTRYYY!!!
Calculate the ph of a 0.20 solution of KCN
February 23, 2009 by MMmm

CHEMISTRYYY
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010 by Justin

CHEMISTRYYY
A hydrated aluminium sulphate A12(SO4)3.xH2O, contains 8.10% of aluminium by mass. Find the value of x
November 19, 2010 by hana

chemistryyy
Germanium has a cubic unit cell with a side edge of 565pm. The density of germanium is 5.36g/cm^3. What is the crystal system adopted by germaium.
February 6, 2009 by Anonymous

chemistryyy
Answer the following two questions about the equivalence point for the titration of 27.8 mL of 0.235 M hypobromous acid (pKa = 8.64) with 0.214 M KOH. 1)Predict if the solution will be acidic, basic or neutral at the equivalence point. 2)Calculate the pH of the solution at the...
September 21, 2011 by Rachel

chemistryyy
Answer the following two questions about the equivalence point for the titration of 27.8 mL of 0.235 M hypobromous acid (pKa = 8.64) with 0.214 M KOH. 1)Predict if the solution will be acidic, basic or neutral at the equivalence point. 2)Calculate the pH of the solution at the...
September 21, 2011 by Rachel

chemistryyy
The escape velocity of planet earth is 11.2 km/s. At what temperature would helium atoms be able to escape the earth's gravitational pull? (Note: you're calculating the average speed here, which means roughly 50% of the atoms would escape at any given time)
March 6, 2014 by tricia

CHEMISTRYYY
What is the theoretical yield of ethyl chloride in the reaction of 20.2 g of ethylene with 53 g of hydrogen chloride? (For ethylene, 28 amu; for hydrogen chloride,36.5amu ; for ethyl chloride, 64.5 amu.) What is the percent yield if 23.5g of ethyl chloride is actually formed?
April 20, 2012 by Anonymous

Chemistryyy
a) A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid? b) A 0.150 M sodium chloride solution is referred to ...
September 12, 2014 by Xaxus

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