Letty Posted March 20, 2007 Posted March 20, 2007 I need some help from you Chemistry wizzes out there, I need examples of Metallic Bonds, Covalent Bonds and Ionic Bonds due to me being useless at the subject and can't figure them out for myself. P.S. The more, the better. some for covalent bonding: iron oxide, sodium chloride, nickel bromide, potassium nitrate (?), potassium permanganate, silver iodide, magnesium sulphide, lithium fluoride ionic: water, various hydrocarbons ( methane, propane, pentane, octene, cyclobutane) Not so sure about the metallic bonds though - go to google!
McMad Posted March 20, 2007 Posted March 20, 2007 some for covalent bonding: iron oxide, sodium chloride, nickel bromide, potassium nitrate (?), potassium permanganate, silver iodide, magnesium sulphide, lithium fluoride ionic: water, various hydrocarbons ( methane, propane, pentane, octene, cyclobutane) If Im not mistake. Thanks Letty, and cheers for trying anyway Viper but that wasn't what I wanted.
monkeyking87 Posted March 20, 2007 Posted March 20, 2007 Hi Ive got an essay due on "The Roman influence on Ireland" its only a short one (1500) and Ive got 2 days to do it Anyone know any good online resources??
Letty Posted March 20, 2007 Posted March 20, 2007 Hi Ive got an essay due on "The Roman influence on Ireland" its only a short one (1500) and Ive got 2 days to do it Anyone know any good online resources?? http://www.wikipedia.com
Supergrunch Posted March 20, 2007 Posted March 20, 2007 some for covalent bonding: iron oxide, sodium chloride, nickel bromide, potassium nitrate (?), potassium permanganate, silver iodide, magnesium sulphide, lithium fluoride ionic: water, various hydrocarbons ( methane, propane, pentane, octene, cyclobutane) Not so sure about the metallic bonds though - go to google! Umm... water and hydrocarbons are covalently bonded. Wait, now I look at it, I think you've got ionic and covalent the wrong way round (and yes, potassium nitrate is a white ionic solid). So you can use Letty's covalent examples for ionic, and for covalent, you can go for water or pretty much any organic molecule, ranging from hydrocarbons to arenes to proteins. As for metallic bonding, go for any metal (left of the staircase on the periodic table)- platinum, calcium, mercury, caesium, iron, aluminium etc.
DCK Posted March 25, 2007 Posted March 25, 2007 You integrated the 3sqrt3 wrongly. It's a constant, so it becomes (3 sqrt 3)x, and not 2/3 * 3 sqrt 3. The real answer is .5x^2 + 5x + (3 sqrt 3)x
Ellmeister Posted March 25, 2007 Posted March 25, 2007 I need to find information for a spanish talk about the most popular stuff on different media. I tried googling and stuff, including google.es, but i just get lost. Anyone know any sites or helpful links for where i should look to find like, the most popular tv programs in Spain? Thanks
eel Posted March 26, 2007 Posted March 26, 2007 always the little ones that stump meh Q> Express 0.026 reoccuring as a fraction i tried some have assed trail and error method as well as some odd triangles, but i cant seem to get it tis onli a little two marker nehow
Ellmeister Posted March 26, 2007 Posted March 26, 2007 I think you have to multiply by 1000, then make it like: 26.026026026..=1000x .026026026..=x 26=999x then you get 26/999
MoogleViper Posted March 26, 2007 Posted March 26, 2007 It depends what is recurring. Could you retype the question with the recurring numbers in brackets please.
Ellmeister Posted March 26, 2007 Posted March 26, 2007 surely he meant 0.026 recurring, meaning 0.026026026026. Is there a way to put it into a fraction with 0.0262626262..?
Supergrunch Posted March 26, 2007 Posted March 26, 2007 surely he meant 0.026 recurring, meaning 0.026026026026. Is there a way to put it into a fraction with 0.0262626262..? Yes, any repeating sequence of numbers can be expressed as a fraction. And he may have meant 0.026666666... as well.
eel Posted March 26, 2007 Posted March 26, 2007 i was meant 0.0(recurring)2(non recurring)6(recurring)
Letty Posted March 27, 2007 Posted March 27, 2007 i was meant 0.0(recurring)2(non recurring)6(recurring) so you mean 0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...2666666666666666666666666666666666666666666666666666666666666666666666? Is that even possible?
Supergrunch Posted March 27, 2007 Posted March 27, 2007 i was meant 0.0(recurring)2(non recurring)6(recurring) Can you do it with dots? I'm still not sure what you mean. Or alternative, tell me the number it is: 1. 0.026666666... 2. 0.026262626... 3. 0.026026026... 4. 0.026060606... Unless, of course, it's something else entirely. so you mean 0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...2666666666666666666666666666666666666666666666666666666666666666666666? Is that even possible? No.
AeroScap Posted March 27, 2007 Posted March 27, 2007 You mention you want the house finished by Sept 1st at the latest. The contractor makes a statement in reference to the deadline "mid-august" if he was given the job. The statement was made on the 3rd April whereas the contract was signed on the 4th April. Q. If the statement by the contractor was a term of contract, would it be considered to be a condition or a warranty? [5 marks]
Supergrunch Posted March 27, 2007 Posted March 27, 2007 0.026060606060... = 0.02 + 0.0060606060... = 2/100 + 0.01(0.60606060...) So lets deal with the 0.60606060... 0.60606060... = x 100x = 60.60606060... 99x = 60 x = 60/99 = 20/33 Thus: 0.026060606060... = 2/100 + 0.01(20/33) = (2 + 20/33)/100 = (86/33)/100 = 86/3300 = 43/1650 Wow, never had to do that before.
MoogleViper Posted March 28, 2007 Posted March 28, 2007 You never had to do those? We spent a bit of time this year on them. I loved them. So fucking easy.
Ginger_Chris Posted March 28, 2007 Posted March 28, 2007 Easy but useless, everything should be in fractions all the time, until the last step. There should never be any need to ever convert from a decimal to fraction.
MoogleViper Posted March 28, 2007 Posted March 28, 2007 Easy but useless, everything should be in fractions all the time, until the last step. There should never be any need to ever convert from a decimal to fraction. Never said it was useful. But it's an easy few marks.
Ginger_Chris Posted March 28, 2007 Posted March 28, 2007 Never said it was useful. But it's an easy few marks. I want to do exams where i get marks from converting decimals to fractions
MoogleViper Posted March 29, 2007 Posted March 29, 2007 I want to do exams where i get marks from converting decimals to fractions You're past GCSEs.
Supergrunch Posted March 29, 2007 Posted March 29, 2007 Easy but useless, everything should be in fractions all the time, until the last step. There should never be any need to ever convert from a decimal to fraction. Yeah, and everyone should use vulgar fractions. Why do they even teach things like 4 and 2/3, when you can say 14/3? I want to do exams where i get marks from converting decimals to fractions Yes, me too. I've finished double maths A-level now, but I'll have some more maths to do at university.
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