Sunday
December 21, 2014

Posts by Derrick


Total # Posts: 155

Chemistry
The 2 posts above can be erased.
July 19, 2010

Chemistry
Oh my, I only wanted to submit one post, so sorry about that.
July 19, 2010

Chemistry
What is needed for nuclear fusion to occur? pressure, a beta particle or high temperature? I think it's only high temperature and pressure needed.
July 19, 2010

Chemistry
Sorry I wasn't finished posting, I accidentally pressed enter and it ended up posting. I don't get how to solve the half-life qquestion. My other questions are... The half-life of a particular radioactibe isotope is 6 hours. What percent of the daughter isotope would ...
July 19, 2010

Chemistry
What is used to tell different isotopes of a particular element apart? A. the mass number B. the atomic number C. the number of protons D. the number of electrons A is the answer. After how many half-lives are there equal amounts of parent and daughter isotopes. A 1 B 2 C 3 D ...
July 19, 2010

Chemistry
Thank you very much sir for your assistance.
July 18, 2010

Chemistry
Which of the four factors affecting reaction rate is most important in each example below? Choose from among concentration, temperature, surface area, and catalyst. A? Extra dish soap is added to help cut the grease when washing a frying pan. = Concentration B) Firewood is ...
July 18, 2010

DrBob222
These are the other equations I've balanced. I need help with one. AgNO3 + K2Cr2O7 --> double replacement AgNO3 + K2Cr2O7 --> AgCr2O7 + K2NO3 Please tell me if I've balanced these right. Br2 + NiI3 --> single replacement, element is a non-metal Br2 + NiI3 --&...
July 15, 2010

DrBob222
Thank you very much DrBob222, if I ever get stuck again, I'll be sure to ask you, but before that I'll try to figure out the problems myself as a challenge. Thank you
July 15, 2010

DrBob222
DrBob222 I am kind of stuck with the balancing stuff, and I already had send the post, did you not read it?
July 15, 2010

Chemistry
Also for this equation: BaCl2 + Pb(NO3)2 I know that there is an invisible 1 infront of Ba, and that Cl is 2, but say if there wasn't that 2 there, then would there be an invisible 1 coeffient infront of Cl?
July 15, 2010

Chemistry
DrBob222 I also want to ask you something which was confusing me like a nightmare all that time, and today I realized it. For ex. C6H12O4 + 7O2 --> 6CO2 + 6H2O This equation here is balanced. But on the right side the coefficients 6 and 6 equal up to 12, isn't the left ...
July 15, 2010

Chemistry
BaCl2 + Pb(NO3)2 Could you also show me how to do the double replacement thing. The obly reactions I am getting how to do are synthesis and combustion. I need to practise alot on the other ones. Could you please show me step by step how you balance this equation. Thank you ...
July 15, 2010

Chemistry
The decomposition is a bit harder for me than the rest. I looked over the examples in my book tons of times, but I still don't get it. Rb2O --> Decomposition Rb + O2 I don't know what to do rest.
July 15, 2010

Chemistry
C) C2H6+O2 --> Combustion Products: 2 molecules of Carbon dioxide, 3 molecules of water C2H6 + 4O2 --> 2CO2 + 3H2O D) C6H12O4 + O2--> Combustion Products: 6 molecules of Carbon dioxide, 6 molecules of water C6H12O4 + 7O2 --> 6CO2 + 6H2O sorry I forgot to mention ...
July 15, 2010

Chemistry
A) Al + F2 --> Synthesis Products: 2 molecules of aluminum fluoride 2Al + 3F2 --> 2AlF3 B) K+O2 --> Synthesis Products: 2 molecules of Potassium oxide 4K + O2 --> 2K2O C) C2H6+O2 --> Combustion Products: Carbon dioxide, water C2H6 + 4O2 --> 2CO2 + 3H2O D) ...
July 15, 2010

Chemistry
I'll try to write quickly and post what I've done on here, but please sir stay.
July 15, 2010

Chemistry
They've given me the reaction type themselves, it was in the book. Also can you please stay on this site and provide me with help.
July 15, 2010

Chemistry
I forgot to mention some parts. Each reaction below has been identified by type. Use this information to help predict products. Copy and then complete each equation by writing the products of the reactions. Remember to include subscripts and parentheses when required. It also ...
July 15, 2010

Chemistry
This question is very confusing, I do not understand what it wants me to do. Each reaction below has been identified by type. Use this information to help predict products. Copy and then complete each equation by writing the products of the reactions. Remember to include ...
July 15, 2010

Chemistry
Recognize each of the following reactions as synthesis, decomposition, single replacement, double replacement, neutralization, or combustion. A)H3PO4 + 3NaOH -> Na3PO4 + 3H20 This reaction is known as Neutralization. B)P4 + 5O2 -> P4O10 This reaction is known as ...
July 13, 2010

Chemistry/ Dr.Bob222
DrBob222 I am beginning to understand about balancing equations well, thanks to your help, but there are still some other things, which I am having a hard time figuring out. Complete and balance the following chemical reactions between an acid and a metal. A) HBR + Mg -> ...
July 13, 2010

Chemistry
DrBob222 you have no clue how much you taught me in one day. Thank You so so much for this help of yours. How can I ever thank you.
July 12, 2010

Chemistry
E) H2SO4 + NaOH = H2SO4+ 2NaOH --> 2H2O + Na2SO4 About the last 2 in Na2SO4, It should be a coefficient right? Not a subscript. Reactants: Sulphic acid, sodium hydroxide Products: Sodium sulphate, water
July 12, 2010

Chemistry
C) H3PO3 + Ca(OH)2 = H3PO3 + 3CaOH2 Reactants: Phosphic acid, Calcium hydroxide Products: Calcium phosphate, water Could you provide me an example of what you mean by that rule. I sort of understand, but an example would be better.
July 12, 2010

Chemistry
Complete and balance the following neutralization reactions. then, write the names of all the reactants and all the products in each chemical reaction. A) HNO3 + Al(OH)3 = 3HNO3 + Al(OH)3 -> Al(NO3)3 + 3H2O Reactants: Nitric acid, Aluminum hydroxide Products: Aluminum ...
July 12, 2010

Thanx DrBob222
Thank you sir for helping me out with those chemistry problems.
July 11, 2010

Chemistry
Balance each of the following skeleton equations. This is the last one left to balance. D) C4H10 + O2 -> CO2 + H2O = C4H10 + O2 -> 4CO2 + 10H
July 11, 2010

Chemistry
Balance each of the following skeleton equations. C) C3H8 + O2 -> CO2 + H2O This one was a bit harder for me to balance out, but this is what I managed to do. C3H8 + O2 -> 3CO2 + 8H
July 11, 2010

Chemistry
I was getting restless to post these questions, so I decided to go ahead and post them. Balance each of the following skeleton equations. B) Na + F2 -> NaF I balanced out this equation like this. Na + F2 -> Na2F OR would I write it as -> Na + F2 -> NaF2 , would the...
July 11, 2010

Chemistry
Balance each of the following skeleton equations. A) KCl + Pb(NO3)2 -> PbCl2 + KNO3 I balanced it out like this. KCl2 + Pb(NO3)2 -> PbCl2 + 2KNO3 After knowing if I've done this correctly, I'll post on my other questions.
July 11, 2010

Chemistry
Thank you very much sir
July 11, 2010

Chemistry
List the total number of each type of atoms in the following reactants. A) 2HCL + Ca(OH)2 = 6 hydrogen, 2 carbon, 2 lithium, 2 calsium, 4 oxygen B) 2Na3PO3 + 3Ca(NO3)2 This one is a bit more complicated. May any chemistry teacher show me how to do this. Thank you very much in ...
July 11, 2010

Chemistry/Part I don't get
The part I don't get is the atom part. That wording is just so complicated. "One atom of each of the elements in the second period"
July 8, 2010

Chemistry
When it says, " Draw a Lewis diagram for each of the following. " a)One atom of each of the elements in the second period. Is it asking me to draw a Lewis diagram for Lithium and Beryllium?
July 8, 2010

Chemistry
Draw a bohr diagram of the protons and electrons in each of the following: The ionic compounds lithium fluoride, LIF, and beryllium chloride, Becl2. Do I draw these 2 compounds seperately, and I'm unsure of how.
July 8, 2010

Chemistry
Thank you very much sir
July 8, 2010

Chemistry
Thanks for the clarification
July 8, 2010

Chemistry
13?
July 8, 2010

Chemistry
I mean 12 atoms.
July 8, 2010

Chemistry
Draw a Bohr diagram of the protons and electrons in each of the following. a) an atom of magnesium Do I draw this with 19 atoms surrounding the shell of Magnesium around?
July 8, 2010

Chemistry
Thank you sir
July 8, 2010

Chemistry
The noble gas in period 1 is not Hydrogen, so it would be Helium He. Sir, can you also take a look at my "Damon" post.
July 8, 2010

Chemistry
Name and give the symbol for each of the following: a)the element in period 3 group 2 = Magnesium = Mg b)the halogen in period 4 = Bromine = Br c)the element in period 6 and group 11 = Gold = Au d)the akali metal in period 2 = Lithium = Li e)the noble gas in period 1 =Hydrogen?
July 8, 2010

Chemistry
Thank you both very much for your assistance
July 8, 2010

Chemistry
I understand
July 8, 2010

math prime factorization
3*5
September 28, 2009

math
8/-7+4/5 in simplest fraction form
May 21, 2009

SOCIAL STUDIES
How did Squanto, the interpreter for Massasoit and the Pilgrims,learn English?
February 10, 2009

math
Find the area of the shaded part in the figure. Use 3.14 for ƒàƒnand round your answer to one decimal place. the triangle as a cicle in the middle the right side is 15ft and the bottom side is 15ft what is the answer
October 10, 2008

English grammar
Life is full of choices, so I must learn to make good ones.
November 29, 2007

Chemistry
Pure water is added to 25.0 mL of a 1.00 M HCL solution. The new solution has a volume of 2.00 L. What is the pH of the new solution.
November 1, 2007

physics
A jumbo jet taxiing down the runway receives word that it must return to the gate to pick up an important passenger who was late to his connecting flight. The jet is traveling at 45.0 m/s when the pilot receives the message. What is the acceleration of the plane if it takes ...
September 10, 2007

algebra1/McDougal Littell
a page of pictures for a yearbook is 8 1/2 inches by 11 inches. The space between the pictures is 3/16 inch. How high can each picture be to fit seven down the length of the page? since the the length of the page is 11 inches, and there has to be seven pictures down the length...
November 16, 2006

Math(Unit Rate)
i need help
November 13, 2006

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