forehead7 Posted March 24, 2011 Share Posted March 24, 2011 Is anyone here good at Chemistry. I'm struggling a bit with calculations (Standard Grade). How do you calculate the number of moles if you're given a mass? E.g, 93 g phosphorus. This is really easy but I can't do it! I think you'll need to find out the mass of 1 mole of phosphorus then divide 93 by that mass (making sure they're both in grams) and then that'll be how many moles there are. I think that's it, my standard grade chemistry has all but left me. 0 Quote Link to comment Share on other sites More sharing options...
ScottR96 Posted March 24, 2011 Share Posted March 24, 2011 I think you'll need to find out the mass of 1 mole of phosphorus then divide 93 by that mass (making sure they're both in grams) and then that'll be how many moles there are. You're absolutely correct. It's just the opposite of finding the G.F.M (gram formula mass) but you divide instead of multiply. I manage to grasp all the hard aspects of Chemistry but it's the easy things I struggle with and really have to put my mind to in order to get it right. 0 Quote Link to comment Share on other sites More sharing options...
Sergeant Wilson Posted March 25, 2011 Share Posted March 25, 2011 I think you'll need to find out the mass of 1 mole of phosphorus then divide 93 by that mass (making sure they're both in grams) and then that'll be how many moles there are. I think that's it, my standard grade chemistry has all but left me. Where would you get a mole at that time of night? 0 Quote Link to comment Share on other sites More sharing options...
Guest The Phoenix Posted March 25, 2011 Share Posted March 25, 2011 Where would you get a mole at that time of night? Moles can be found in most parts of North America, Asia, and Europe, although there are no moles in Ireland. 0 Quote Link to comment Share on other sites More sharing options...
Unleash The Nade Posted March 25, 2011 Share Posted March 25, 2011 Moles can be found in most parts of North America, Asia, and Europe, although there are no moles in Ireland. I have one on my right shoulder 0 Quote Link to comment Share on other sites More sharing options...
weirdcal Posted March 25, 2011 Share Posted March 25, 2011 Yes Highlight the text you would like to change. Then press the Shift + F3 . It will change between sentence case, all caps, and all lowercase letters. Keep pressing the shortcut key until the font is in the desired case. otherwise, highlight, format menu, change case. gives all the options. its a pain in excel as well (=proper(A,1) fyi) 0 Quote Link to comment Share on other sites More sharing options...
Cowden til i die Posted March 25, 2011 Share Posted March 25, 2011 Where can I get a couple of tax disc holders for f**k all? 0 Quote Link to comment Share on other sites More sharing options...
Turbo_dee Posted March 25, 2011 Share Posted March 25, 2011 From someone else's car... 0 Quote Link to comment Share on other sites More sharing options...
Zen Archer (Raconteur) Posted March 25, 2011 Share Posted March 25, 2011 Moles can be found in most parts of North America, Asia, and Europe, although there are no moles in Ireland. I had a Mole removed from my cock, sharp toothed b*****d. 0 Quote Link to comment Share on other sites More sharing options...
Unleash The Nade Posted March 25, 2011 Share Posted March 25, 2011 Where can I get a couple of tax disc holders for f**k all? Enlarge this to full size,print,cut out and use. It should help you save the 40p or so you would need to splash out buying one, ya tight c**t 0 Quote Link to comment Share on other sites More sharing options...
Unleash The Nade Posted March 25, 2011 Share Posted March 25, 2011 I had a Mole removed from my cock, sharp toothed b*****d. Aye,Adrians maw told him to get that seen to at the dentist ages ago As you'll see his jaws still locked in same the position, as when you last saw him -1 Quote Link to comment Share on other sites More sharing options...
Sergeant Wilson Posted March 25, 2011 Share Posted March 25, 2011 I had a Mole removed from my cock, sharp toothed b*****d. You started at the wrong end. You need to subdue a mole, before trying that. Show it who's boss. 0 Quote Link to comment Share on other sites More sharing options...
mid-table Posted March 25, 2011 Share Posted March 25, 2011 What's the best way to drive to Stoke? Start in Hanley. 0 Quote Link to comment Share on other sites More sharing options...
mid-table Posted March 25, 2011 Share Posted March 25, 2011 If a right angled triangle has an adjacent of 45 and an opposite of 2, what is the angle between the adjacent and hypotenuse? On a similar theme, if the adjacent is 45 and the angle between the adjacent and hypotenuse is 1 degree, how long is the opposite? This is probably straightforward trigonometry, but I'm not good at angles, prefer statistics. 0 Quote Link to comment Share on other sites More sharing options...
ffcsam Posted March 25, 2011 Share Posted March 25, 2011 If a right angled triangle has an adjacent of 45 and an opposite of 2, what is the angle between the adjacent and hypotenuse? On a similar theme, if the adjacent is 45 and the angle between the adjacent and hypotenuse is 1 degree, how long is the opposite? This is probably straightforward trigonometry, but I'm not good at angles, prefer statistics. I am totally at a loss at this. My high. school maths was shocking tbh. *ashamed 0 Quote Link to comment Share on other sites More sharing options...
GingerSaint Posted March 25, 2011 Share Posted March 25, 2011 (edited) Tan(Angle) = opposite/adjacent Tan(Angle) = 2/45 Angle = Tan-1 2/45 Tan(1) = opposite/45 Opposite = 45 Tan1 Don't have a calculator so you will have to work it out but I think that's how you do it. Someone can correct me if not. Edited March 25, 2011 by GingerSaint 0 Quote Link to comment Share on other sites More sharing options...
Ad Lib Posted March 25, 2011 Share Posted March 25, 2011 If a right angled triangle has an adjacent of 45 and an opposite of 2, what is the angle between the adjacent and hypotenuse? On a similar theme, if the adjacent is 45 and the angle between the adjacent and hypotenuse is 1 degree, how long is the opposite? This is probably straightforward trigonometry, but I'm not good at angles, prefer statistics. tan x = opposite/adjacent = 2/45 x = tan-1(2/45) tan 1o = opposite/45 opposite = 45 tan 1o 0 Quote Link to comment Share on other sites More sharing options...
Ad Lib Posted March 25, 2011 Share Posted March 25, 2011 Sin(Angle) = opposite/adjacent Sin(Angle) = 22.5 Angle = Sin-1 22.5 Sin(1) = opposite/45 Opposite = 45 Sin1 Don't have a calculator so you will have to work it out but I think that's how you do it. Someone can correct me if not. sin = opposite/hypotenuse 0 Quote Link to comment Share on other sites More sharing options...
Guest The Phoenix Posted March 25, 2011 Share Posted March 25, 2011 tan x = opposite/adjacent = 2/45 x = tan-1(2/45) tan 1o = opposite/45 opposite = 45 tan 1o Feckin' smart arse. 0 Quote Link to comment Share on other sites More sharing options...
forehead7 Posted March 25, 2011 Share Posted March 25, 2011 If a right angled triangle has an adjacent of 45 and an opposite of 2, what is the angle between the adjacent and hypotenuse? On a similar theme, if the adjacent is 45 and the angle between the adjacent and hypotenuse is 1 degree, how long is the opposite? This is probably straightforward trigonometry, but I'm not good at angles, prefer statistics. You can work out the angles of a triangle using SOH CAH TOA Sin is Opposite over Hypotenuse Cos is Adjacent over Hypotenuse Tan is Opposite over Adjacent 0 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.