Why is the relative atomic mass of chlorine is 35.5 and not 35 or 36?
99720
Atomic mass is based on the average amu (atomic mass units) of C 12 therefore 35.5 amu is the average atomic weight for Cl 17
199003
a proton has a weight of approximately 1836.15 electrons
724799
Aluminium is Al3+\n Chlorine is CL1-\n Potassium is K1+ \n\nHahaz, I think should be correct. Hahaz, I did your homework.
839242
chlorine is more electronegative. it is in the '2nd column from right in the periodic table' it is a halogen. the halogen group contains chlorine, flourine, bromine, iodine etc. They are the most electronegative elements of all. nitrogen is placed to the left of chlorine & hence is less negative than Cl. With respect to, say carbon, nitrogen is electronegative [as in CN - cynide] while, in compounds like NO/NO2/ N2O4/ NO3 etc. Nitrogen is electropositive [as compared with oxygen].\n\nu can IM me at YahooMessenger [my ID is fizanaqsh] or email me at my email address which is  fizanaqsh@yahoo.co.in  or even chat via Skype where my ID is homewornetguru, in case u got any more difficulties with chemistry/english/math or physics etc.
933205
electron affinity\n\nas you are changing Cl2 ->2Cl-
808333
You have a common ion effect problem\n\nPbCl2 <=> Pb+2 +2Cl-\n\nKsp=[Pb+2][Cl-]^2\nYou know that [Pb+2]=5.5*10^-3\nAlso from the reaction you know that the amount of Cl- coming from the PbCl2 is double the amount of Pb+2.\nSo if C is the concentration of Cl- coming from HCl, the amount of Cl- at equilibrium is [Cl-]=C+2*[Pb+2] \n\nSo Ksp= [Pb+2]* (C+2*[Pb+2])^2=>\nif we assume that C>>2[Pb+2] then C+2*[Pb+2] =C and \nKsp=[Pb+2]C^2 =>1.7*10^-5= 5.5*10^-3 C^2 =>\nC=55.6 * 10^-3 but 2*[Pb+2]=11*10^-3, so we can't do the approximation...\n\nLet's name [Pb+2]=p for simplicity\n\nKsp=p(C+2p)^2 =>\nKsp/p= C^2+4pC+4p^2 =>\nC^2+4pC+4p^2-Ksp/p=0 =>\nC^2+2.2*10^-3 C -2.97*10^-3 =0\n\nC=0.5*(-2.2*10^-3 + SQRT( (2.2*10^-3)^2 +4*2.97*10^-3) ) =>\nC= 5.34*10^-2\n\nIf you added Va L of HCl, then\nC=mole HCl/Vtotal = Ca*Va/(Va+0.12) =>\nCVa+0.12C=CaVa =>\nVa=0.12C/(Ca-C)= 0.12*0.0534/(0.12-0.0534) = 0.0962L or 96.2 ml
148855
Note that mass number is not the same thing as atomic mass; mass number is always a whole number, whereas atomic mass is always an average of the various isotopes of that element.  Lithium can have a mass number of 6, but it's more commonly 7, and its atomic mass is 6.941.
336452
NaCl IS NOT TWO ATOMS (sodium and chlorine) BONDED TOGETHER!\n\nNaCl is what is known in chemistry as an ionic salt.  That means that a very positively charged Na+ ion met up with a very negatively charged Cl- ion, and because opposite charges attract, they got close to each other in what is known as an ionic bond, which isn't really a bond, just two particles hanging out together.
1171138
They have the same atomic number but different mass numbers?\nOdd kind of an insult...
780771
Na : atomic mass = 23\nCl : atomic mass = 35\natomic mass of compound = 58 g/mole\n350. mL = 0.35 L\n\n.376 Molar solution means 58 moles / liter\n(58 * (grams / mole)) * (.376 * (moles / liter)) * (.35 L) = 7.6328 grams
440454
the R.A.M. is the average mass of an atom of an element, taking account of its natural isotopes & their percentage abundance.\neg: the R.A.M. of CaCl2  :\n     the exam paper will give you the the R.A.M. s of Calcium-40 & Chlorine - 35.5,so the answer is,\n         = (1*40)+(2 * 35.5)\n         = 40+71\n         = 111\n     hope this helped.Cheerz!
710065
atoms of positive charge are lighter than negative.
237970
Hi,\n\nThe number of neutrons is the atomic mass minus the atomic number. \n\nThe isotopes of chlorine vary from 031 to 047 out of which isotope 35 and 37 are the stable ones. \n\nChlorine has 17 protons. So,\n\nfor Chlorine 35, it is 35 - 17 = 18 neutrons. \n\nthe same way,\n\nfor Chlorine 37, it is 37 - 17 = 20 neutrons. \n\nThus,\n\n17 protons plus 18 neutrons make chlorine-35. \n\n17 protons plus 20 neutrons make chlorine-37.
855199
7.62 moles of CCl4 containes 4*7.62=30.46 moles of Cl\n30.46*6.023*10^23=1.836*10^25 Cl atoms
808063
I believe it's 34. Each chlorine atom has 17 electrons. Since they're both non-metals, they form a covalent bond, inother words instead of losing and gaining atoms, the two chlorine atoms share their extra electron so both can have a stable octet. Just remember: metal & non-metal=ionic bond \nnon-metal & non-metal=colvalent bond
462911
relative atomic mass of magnesium (Mg) is 24.5
802841
I assume you are talking about ordinary table salt, sodium chloride (NaCl).  \n\nThe molecular mass of NaCl is 58.44 gm/mol.  One gram of NaCl therefore contains:\n\n1 gm / (58.44 gm/mol)= 1.711*10^-2 moles\n\nEach mole of Na is equal to one "equivalent" because Na forms ions that have a charge of +1, so for Na+:\n\n1.711*10^-2 moles = 1.711*10^-2 equivalents = 17.11 milliequivalents