Tuesday

September 30, 2014

September 30, 2014

Total # Posts: 14

**Chem Lab**

I need help with these problems as soon as posible Please
*October 8, 2012*

**Chem Lab**

Calculate the weight of the water lost by heating. Calculate the percentage of water in the hydrate. Calculate the number of moles of H2O lost by heating. Calculate the number of moles of anhydrous salt. Enter the formula of the hydrated salt. Calculate the theoretical ...
*October 8, 2012*

**Chem Lab**

I did a chem lab and have to figure out some stuff off of some data I found during the lab Weight of empty crucible and cover: 19.74 g Weight of crucible, cover and hydrated salt: 22.74 g Weight of crucible, cover and hydrated salt after 1st heating: 22.13 g Weight of crucible...
*October 8, 2012*

**Chem Lab**

Calculate the weight of the water lost by heating. These are the other post lab questions Calculate the percentage of water in the hydrate. Calculate the number of moles of H2O lost by heating. Calculate the number of moles of anhydrous salt. Enter the formula of the hydrated ...
*October 8, 2012*

**Chem Lab**

I did a chem lab and have to figure out some stuff off of some data I found during the lab Weight of empty crucible and cover: 19.74 g Weight of crucible, cover and hydrated salt: 22.74 g Weight of crucible, cover and hydrated salt after 1st heating: 22.13 g Weight of crucible...
*October 8, 2012*

**math**

he boys of a school can be arranged in 12,15 and 18 equal rows and also into a solid square. what is the least number of boys that the school can have?(Hint: find LCM)
*May 15, 2012*

**maths**

the boys of a school can be arranged in 12,15. and 18 equal rows and also into a a solid square.What is the least number of boys the school can have?
*May 15, 2012*

**chemistry**

Electron Affinity: is the energy released when an electron is added to a neutral atom.
*August 21, 2011*

**Math**

Prove the identity: cosx/1-tanx +sinx/1-cotx
*August 20, 2011*

**math**

1. Prove the identity:cosx/1-tanx+sinx/1-cotx=sinx+cosx 2.Prove the identity: cosx/1+sinx+1+sinx/cosx=2secx
*August 20, 2011*

**math**

Prove that (secx+tanx)^2=1+sinx/1-sinx Thanks in advance.
*August 20, 2011*

**physics**

;if a hoop A is made of iron & hoop B of wood are pushed at same time down to an inclined plane. find velocity of both if height of plane is 1m?
*January 23, 2011*

**arif**

when I tried to find solution of 1/(x-3) + 1/(x-9) = 1/(x-2) + 1/ (x-8) all terms of x are cancelled out why? Is there any rule to find solution of this?plz guide me.
*December 2, 2010*

**math array**

my grandaughter is doing array dot to dot sample make as manydifferent arrays as possible number 5 how would i go about doing a array with dots please, desperate in need to keep up with my grandaughters homework.
*August 17, 2009*

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