M.W. Tris is 121.14 and the M.W. of NaCl I dont know right now.
128389
weight/M.W. = # of moles = 50 x 10E-3 in one litre\n\nso dissolve 6.057 g of Tris in 1 L of water and it should be 50mM
444834
you can re write aws 76-26+(24/12)*7 and you'll get the answer\n\n50+2*7\n50+14\n\n\nyou have to know the format of equation if you take 24/(12*7) you'll get whole different answer
232613
For the first one:\nNaCl(l) ==> Na(s) + Cl(g)\n\nFor the second one, more information is required, either the volume or the concentration of solution that was prepared.
440363
Nope, :s sorry\n\nIts the same as before. The K(w) of water is 1.0 *10^-14\nK(w) = [H+][OH-]\n1.0*10^-14=[H+][2.8*10^-4]\n[H+]= 3.57*10^-11\n\npH=-log[H+]\n the pH is 10.4\n\nand pOH =-log[OH-] u have that in the ques\n\nHappy trails
497614
a= r * w^2 = .12 * 2^2 = .12 *4 = .48 m/s^2
355373
You are not seriously asking us, right?\n\nJust look at the atomic number of the element. In this case, Na has an atomic number of 11, so there are 11 protons.\n\nJust for the record, this should have been under "Chemistry", not "Mathematics"
245853
Perimeter=2L+2W\nPerimeter=18\nL=W+3\n\nPerimeter=2(W+3)+2W\nPerimeter=2W+6+2W\nPerimeter=4W+6\n18=4W+6\n18-6=4W\n12=4W\n12/4=W\n3=W
541979
You need to solve this formula:\n\n24 = 2(W+3) + 2W\n\n1) Divide everything by 2\n\n12 = (W + 3) + W\n\nor 12 = 2W +3\n\n2) Now subtract 3 from each side of the equation.\n\n9 = 2W\n\n3) Then divide both sides of the equation by 2.\n\n4.5 = W\nor\nW = 4.5\n\n4) To get L, add 3 to W:\n\nL = W + 3\nL= 4.5 + 3 \nL = 7.5
551385
Gopal has the correct answer! \n\nSo... becareful with some other results... and... never use:\n0.833 instead of 5/6... it's a mistake!\n\nFinished Algebra with 19!
611311
50 - 39.48\n100 - 1:30.77\n200 - 3:11.45
400379
a) 2NaCl ---> 2Na + Cl2\n\nb) pretty sure its 9.2793 g of Na
433872
AlCl3... the 3 is a subscript
177899
No.\nYou have to find cos(100) and then multiply it by 24\ncos(100) = -.1736
378758
divide the 15.8 g by the gfw ( molecular weight of Lithium chloride )
238702
I'm not giving you the answer, but Cos is adjacent over hypotenuse.  Also, if you wanted the question answered correctly, us answering people might want to know where all of the letters are in relation to the triangle.
74570
each one exerts 623N so overall it exerts 3742N.\n\ni dont care if its wrong (im too lazy to actually try to figure it out properly and check it n stuff)
550499
Depends on what the weather's like where you are.  If it's STP, then the answer is 1013.25