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April 24, 2014

Search: CHEMISTRYYY

Number of results: 9

chemistryyy
what are metallic bonds?
Sunday, October 24, 2010 at 10:27pm by Anonymous

CHEMISTRYYY!!!
Calculate the ph of a 0.20 solution of KCN
Monday, February 23, 2009 at 3:37pm 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?
Monday, April 26, 2010 at 5:58pm by Justin

CHEMISTRYYY
A hydrated aluminium sulphate A12(SO4)3.xH2O, contains 8.10% of aluminium by mass. Find the value of x
Friday, November 19, 2010 at 5:21am 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.
Friday, February 6, 2009 at 8:13pm 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...
Wednesday, September 21, 2011 at 2:49pm 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...
Wednesday, September 21, 2011 at 2:59pm 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)
Thursday, March 6, 2014 at 7:41pm 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?
Friday, April 20, 2012 at 12:51pm by Anonymous

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