The weight of 4 mEq of calcium is?
967003
the number of milliequivalents (mEq), or the number of millimoles (mmol)\nCalcium has a molecular weight of 40.08 grams/mole\nCalcium has a valence of +2\nThe equivalent weight = (40.08grams/mole)/(2 equivalents/mole) = 20.04 grams/eq\nso the weight is 80.16g
462911
relative atomic mass of magnesium (Mg) is 24.5
1175708
It is Calcium and phosphrus.
53237
about 170's a good weight.\n\ndinos
715558
OK, but you need to look up atomic weights or calculate molar mass.\n\n   Grams = Moles x molar mass  OR  moles x atomic mass\n\n    Moles = Grams/(molar mass) OR Grams/(atomic mass)
57272
1 mole (also represented as mol)= 6.022x10^23.  This is just a number.  Molecules are represented in mol quantities because they're too small to work with otherwise.  So that when you are dealing with CaCl2 in these problems, you're actually using 6.022x10^23 molecules of CaCl2.  Additionally, when you see the molecular weight of a molecule, that is actually the weight of 1mol of that molecule.\n1M= 1mol/Litre.  You need 1.27M.  Divide 1.27 by 1,000 to find the number of mol CaCl2 per mL you need.  (1.27/1,000=0.00127mol CaCl2/mL)\nMultiply this by 147.5 to get the number of mol CaCl2 you will have.  (0.00127*147.5= 0.187325mol CaCl2)\nNow multiply this number by the molecular weight of CaCl2 to get your answer!  (0.187325*110.984= 20.79g CaCl2)
780066
V = nRT/P\nV = (25g/44g/mol)(0.08206Latm/molK)(298K)/1atm\nV = 138.9 L
969471
Calcium is located in Group 2, Period 4, and is in the Alkaline Earth metals family.
1074974
its calories multiplied by 4.  65 calories multiplied with 4 = ... kjoules
308606
Calcium Content of Selected Nondairy Foods:\n\nFood\nPortion Size\n\nMg of Calcium\n-------------------\n\nAlmonds \n1/4 cup\n\n92\nBaked Beans \n1/2 cup\n\n64\nBlackstrap Molasses \n1 tblsp\n\n145\nDried Figs \n2 med\n\n30\nMustard Greens \n1/2 cup\n\n50\nOrange \nmedium sized\n\n52\nRed kidney beans - cooked \n1/2 cup\n\n25\nRhubarb - cooked \n1/2 cup\n\n174\nSalmon - canned \n3.5 ounces\n\n185\nTofu (made with calcium) \n1/3 cup\n\n100
1006390
You need to know the density of whatever it is you want to convert.  1 ml of water at 4 degrees C is has a mass of 1 g or 1000 mg.  To convert any other liquid you must multiply by the specific gravity or density.
159316
[Ca(NO3)2]=n/V  ---> n=[]*V= 0.390M * 0.044L=0.01716 mol\nn=m/M ---> m=n*M= 0.01716mol * 164 g/mol=2.81424 g
858350
4.184 J = 1 calorie\n\n4.184 * 542 =   x\n  x= 2267.7 Joules
778176
Use the periodic table of the elements.  The "weights" are in grams per mol.  Just use algebra and solve for the number of mols.  Then you know how many atoms there are by the number of mols which is a definite number.
734649
4 kg = 8.81 lbs\n\n400 g = 0.881 lbs
812798
3Ca(OH)2+2H3PO4>Ca3(PO4)2+6H2O
149820
Tricalcium Orthophosphate is a synonym for Calcium Phosphate Ca3(PO4)2.\n\nIt is an ionic compound consisting of  Calcium: Ca2+ and Phosphate (PO4)3-\n\nCommon uses include photographic developers, water softening, PH value adjustment, among other things.\n\nIt is a white powder and is mol weight is 286.22 g/mol.\n\nComposition:\n42.01% Calcium\n57.99% Phosphate (Phosphorus and Oxygen)