Sunday
April 20, 2014

Posts by Click6


Total # Posts: 7

Chemistry
Can't you be nicer and help me out? Thanks a lot (:

Chemistry
Write an equation (chemical or ionic) and use oxidation numbers to find out what is being oxidized and what is being reduced. (a) aluminum + oxygen (b) magnesium + steam (c) iron + dilute hydrochloric (d) copper(ii) oxide + carbon (e) bromine + potassium iodide solution

Chemistry! I need help quick! Thank you very much!
2h2O2 + 2H2O ---> 2H2O + O2 If 50cmcube , 2.0 mole/dmcube of hydrogen peroxide is decomposed and volume of oxygen gas collected. How much hydrogen peroxide is decomposed?

Math algebra (urgent!) help me! Thanks a lot!! (;
Mr lol bought x oranges for $30 and sold them at a profit of 5cents per orange. Write down the (i)cost price of an orange. (ii)the selling price of an orange When he had sold all except 20 of the oranges, he found he had received $28. (iii) form an equation in x and show that ...

Math
Btw Henry, why multiply by 20 in the end? Is it because he had sold all except 20 of the oranges?

Math
Appreciate both of you who help me! Thanks!!!!!

Math
Thanks a lot Henry! Your working is right! Btw, thank too Raymond for helping me out, I appreciate it a lot (:

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