Number of results: 2,192
Describe the differance between chemistry and chemical technology. Technology is the making of applications. Chemical technology...making chemicals for practical or commercial purposes. Chemistry...the study of materials, their reactions
Tuesday, August 16, 2005 at 4:41pm by Jane
If 4.75 mL of cycohexene is reacted with 7.04 g of bromine, which is the limiting reagent? What is the theoretical yield of product? Alkenes like cyclohexene undergo addition reactions with bromine to produce dibromoalkanes. So, write and balance the equation. Then, calculate ...
Sunday, September 4, 2005 at 5:06pm by Nisar
The problem you helped me with: A liter of a solution saturated at 25 deg C with calcium oxalate, CaC2O4 is evaporated to dryness, giving a .0061 gm residue of CaC2)4. Calculate the concentrations of the inons, and the molar solubility and the solubility product constant for ...
Sunday, June 11, 2006 at 6:02am by Anonymous
Compound A is a clear colorless liquid with a familiar, pleasant odor, which boils at 91-92C. A dissolves readily in water. When a solution of 5 drops of A in 1 mL of water is tested with blue and red litmus, neither test paper is seen to change color. The addition of a few ...
Monday, June 12, 2006 at 8:17pm by Jay
complete and balnces theses reactions
how do i complete and balnces theses reactions???? CH3-CH2-CH3 (g) + Br2 (l) --> like how in the world????? do i do this? lol aint got a clue wish i would have listened at school now. Alkanes usually react with a halogen to form one of several halides. The simplest reaction...
Tuesday, June 13, 2006 at 12:33pm by bobby
We have to write the balanced redox equation for this and this is the only one im stuck on. Incase theres another way to do it, we have to do it where you write all the oxidation numbers and then find out which one is reducaed which is oxidized, then write the half reactions, ...
Tuesday, June 13, 2006 at 3:54pm by Tracy
Hey...so writerteach. told me that u guys put the website on a new server and lost info. Well here are my questions again...which I posted before. Thanks for ur help on the previous post. 1. The disposal of used batteries is a problem since they often contain poisonous metals ...
Wednesday, June 14, 2006 at 11:22am by help!
why is an understanding of chemistry important in biology? All digestion, nutrition, muscle usage/reactions, cell division/reproduction, and all of the enzymatic processes at work in the body are chemisty. Even eyesight is a chemical reaction. So you need to know something ...
Sunday, June 18, 2006 at 2:01pm by Samantha
1. Sour pickles have a pH of about 3.00. The [OH –] in a typical sour pickle is 8. A solution of sodium hydroxide was prepared for a chemical analysis using 0.65 g in 500 mL. The hydrogen ion concentration in the solution is Use the information to answer the next question. ...
Sunday, June 18, 2006 at 7:27pm by !!!
Hey...how r u guys..thanks for helping me on my previous questions...can u help me solve two questions and check one? Thanks, all the questions are related to the info given: In some industrial processes, sodium chromate is added to water coolants. When the coolant is drained...
Sunday, June 18, 2006 at 8:04pm by David
How do enzymes reduce the energy of activation of biochemical reactions? Enzymes provide an alternate mechanism for bonding/unbonding, thus lowering the energy required. I think most of your answers can be found at the following site: (Broken Link Removed) describe how the ...
Tuesday, June 20, 2006 at 4:00pm by adam
Hey..can you check this for me. It has to do with Predicting Acid-Base Reactions. So here it is: I have to: Predict the most likely acid base reaction(s) that occur. For each reaction, state if the reaction is quantitative, or, if not, state whether products or reactants are ...
Tuesday, July 25, 2006 at 1:50pm by blank
metabolic reactions as exergonic or endergonic what? Food has stored chemical energy. THe body transforms that stored energy to useful energy in the process of metabolism. Energy is released from the food.
Wednesday, August 16, 2006 at 6:59pm by Anonymous
Dr.Bob222- IChemical formulas&Reactions
When aqueous copper(II)chloride reacts with aqueous ammonium phosphate, soluble ammonium chloride forms and copper(II) phosphate precipitates out of solution. 1. Write the balanced molecular equationfor this reaction. 2. Write the balanced complete ionic equation for this ...
Wednesday, January 3, 2007 at 4:28pm by chrissy
Chemistry- Organic Reactions
Can anyone help me with this question: I have to show how I would synthesize the molecules: hexanol, bromo-2-pentene, and ethoxypropane by using the starting matierials: -benzene -bromocyclopropane -butanoic acid -chlorine gas -cyclohexane -ethanol -ethanal -heptanol -2-hexene...
Wednesday, January 31, 2007 at 7:39pm by Michelle
BIO HELP! Light Reactions + Calvin Cycle
Explain why the light reactions and the Calvin cycle are dependent on each other.
Saturday, December 1, 2007 at 8:24pm by Tina
Balance each of the following redox reactions occu
Balance each of the following redox reactions occurring in acidic solution a) SO32- (s) +MNO4- ---> SO42- +Mn2+ b) S2O32-+ Cl2 ---> SO42-+Cl-
Wednesday, August 5, 2009 at 8:58pm by Sunshine
Balance each of the following redox reactions occu
Both half reactions look balanced to me; the second one is twice what is necessary. Notice you can reduce each coefficient by 1/2 to make them 8,1,1,4. Looks like you did a good job to me.
Wednesday, August 5, 2009 at 8:58pm by DrBob222
Thursday, July 29, 2010 at 6:00am by abilify reactions
Chemistry ,Reactions at Electrodes during Electrol
Reactions at Electrodes during Electrolysis Which half-reaction will take place at the cathode during the electrolysis of molten MgCl2? 2Cl- > Cl2 + 2e- Cl2 + 2e- > 2Cl- Mg2+ + 2e- > Mg Mg > Mg2+ + 2e- Which half-reaction will take place at the cathode during the ...
Sunday, April 8, 2012 at 11:54pm by Mahtab