Trevor H

分數
364,065
最佳解答率
66.00%
等級
Lv 7
I have recently retired from a life spent in technical management in the papermaking industry. After completing my studies towards a diploma in Science I started working as a Chemical Technician in a paper mill, later technical Manager of a mill. I continued my studies in the paper technology field including time on a Rotary Scholarship in Canada. For the last 25 years of my working career I was employed to head up the paper chemicals department of a large multinational chemical company. This entailed hands on application of the company's products in the mills. My final assignment was to manage an emulsion polymerisation plant. When I retired I decided to make some contribution to the underpriviliged and I undertook the teaching of chemistry and physics to socially deprived high school students. I live in the city of Durban, in South Africa and the school where I am helping is rural caterng for the education of children living in "informal housing" some of them without parents.
[匿名]
回覆: 2
2015-07-19 3:08 pm
which is more likely to become an anion, calcium or bromine?
[匿名]
回覆: 1
2015-06-02 6:33 pm
How many mL of 6.00 M Sulfuric acid solution would you use to prepare 250 mL of 0.400 M H2SO4 by dilution with distilled water?
[匿名]
回覆: 1
2015-05-05 4:33 pm
Chemistry help please?
[匿名]
回覆: 2
2015-03-01 9:34 am
SbCl3 and H2O. Write the equation?
[匿名]
回覆: 1
2015-03-01 8:22 am
Calculate the Initial pH?
[匿名]
回覆: 1
2015-02-24 2:30 pm
Chemistry?
[匿名]
回覆: 3
2013-12-16 2:06 pm
What is the percent yield if 100 g of C3H8 combusts to produce 200 g CO2?
[匿名]
回覆: 2
2013-02-25 6:22 pm
why are strong acids and strong bases not titrated ?
[匿名]
回覆: 4
2013-01-04 6:48 am
Testing for sulphate ions?
[匿名]
回覆: 1
2012-11-18 9:39 am
Quantitative chemistry question... help?
[匿名]
回覆: 3
2012-09-01 7:34 am
Does the lime-water test conclusively prove the existence of Carbon Dioxide?
[匿名]
回覆: 1
2012-07-27 7:44 pm
A 1.89-L bottle of vinegar contains 5.0% (w/v) of acetic acid (C2H4O2, molar mass 60.1 g/mol) in water.?
[匿名]
回覆: 3
2012-02-21 7:22 pm
Sodium carbonate reacts with sulfuric acid?
[匿名]
回覆: 1
2012-02-18 7:21 am
Chemistry - Mole Concept. Help please..?
[匿名]
回覆: 3
2012-01-06 6:18 am
What is the state of the chemical compounds of the reactions?
[匿名]
回覆: 1
2011-12-24 8:57 am
Concentration Ion in a mixing solution?
[匿名]
回覆: 1
2011-12-23 4:46 pm
Percent yield of a reaction?
[匿名]
回覆: 1
2011-10-01 12:03 pm
A solution is prepared by dissolving 0.56g of benzoic acid (C6H5CO2H), Ka=6,4*10^-5 in enough water to make 1,?
[匿名]
回覆: 3
2011-07-30 1:59 pm
How does IUPAC name TRICARBOXYLIC acids?
[匿名]
回覆: 1
2011-06-29 6:55 am
calculate (a) the H+ ion concentration,(b) the pH, &(c)the percent ionization of a 0.04 M solution of HC2H3O2?
Wa
回覆: 4
2011-06-17 10:45 am
Strength of phosphoric acid?
Wa
回覆: 1
2011-06-17 9:20 am
What is the ionization steps for dibasic weak acid?
[匿名]
回覆: 5
2011-06-12 7:50 pm
What is the balanced chemical equation for Sodium Sulfate + Barium Chloride Na2SO4 + BaCl2 → NaCl + Ba2SO4?
[匿名]
回覆: 2
2011-05-22 8:49 pm
Strong Acid Weak Base Titration Problem!?
Wa
回覆: 0
2011-05-11 3:46 pm
What is the reaction between aqueous ammonia and salt solution?
[匿名]
回覆: 2
2011-04-12 8:10 am
How is this precipitate possible?
[匿名]
回覆: 1
2011-03-17 4:26 pm
The substance H2SO3 is considered...? (weak/strong)?
[匿名]
回覆: 2
2011-03-04 9:07 am
Why can't the production of H2S2O7 be in high pressure conditions?
[匿名]
回覆: 2
2011-01-25 2:54 pm
alkene reacts with bromine water in dark place?
[匿名]
回覆: 2
2010-09-27 7:46 am
What happens in the reaction between SO2 and H2O?
[匿名]
回覆: 4
2010-08-10 2:07 pm
NaHCO3 is acidic salt but shows basic nature in aqueous solution = Why?
[匿名]
回覆: 3
2010-07-22 1:42 pm
How can two regular hydrogen atoms (i.e. no neutrons) fuse to create helium?
[匿名]
回覆: 3
2010-06-25 9:42 am
how can I easily memorize the periodic table of elements? can you give a tip?
[匿名]
回覆: 5
2010-06-15 10:58 am
When Carbon and Hydrogen combine to make Methane.. What happens to the 9th Electron?
[匿名]
回覆: 3
2010-04-02 7:19 pm
What is (sulfite + water) SO3 + H2O --> ?
用戶238897
回覆: 2
2010-03-24 8:48 pm
Non-reversible reactions?
[匿名]
回覆: 2
2009-10-17 8:12 pm
Will CaCl2 (Calcium Chloride) and NaHSO4 (Sodium Hydrogen Sulfate) have a chemical reaction?
[匿名]
回覆: 1
2009-10-01 6:24 am
What is the balanced molecular equation of oxalic acid dihydrate and sodium hydroxide?
[匿名]
回覆: 2
2009-08-11 6:56 pm
Help! stuck on chemistry homework question!?
[匿名]
回覆: 2
2009-05-31 10:56 am
A question about ammonium chloride?
[匿名]
回覆: 2
2009-02-27 2:41 pm
Calorimetry: What is the final temperature?
[匿名]
回覆: 8
2008-12-10 2:48 pm
How long would it take for 1.50 mol of water at 100.0 *C to be converted completely into steam if heat were..?
[匿名]
回覆: 5
2008-03-29 12:53 pm
Dilute hydrochloric acid is added to dilute sodium hydroxide solution.?
本頁收錄日期: 2021-04-12 21:43:43
總收錄問題: 0 / 0 (收錄率: 100.00%)
總收錄回答: 193 / 37795 (收錄率: 0.51%)