Web[10] [11] Unfortunately, ppbv and pptv are also often used for mole fractions (which is identical to volume fraction only for ideal gases). To distinguish the mass fraction from volume fraction or mole fraction, the letter "w" (standing for "weight") is sometimes added to the abbreviation (e.g. ppmw, ppbw). [12] WebFirst, you can calculate the molar mass of FeCl2 by adding the molar masses of Fe (55.845 g/mol) and 2 atoms of Cl (2 times (35.446 g/mol). This gives a molar mass of 126.737 …
Mole (Mol) Definition in Chemistry - ThoughtCo
WebAll of the statements about molarity are correct except A) the abbreviation is M. B) the interpretation of the symbol is "moles of solute per mole of solvent." C) moles- molarityx volume. D) volume = moles/molarity. WebFeb 20, 2011 · One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's … tegut kassel prospekt
Moles - Symptoms and causes - Mayo Clinic
WebSep 7, 2014 · Step 1. Calculate the number of moles of the element. n = 4.95 × 1023 atoms × 1mol 6.022 × 1023atoms = 0.8220 mol Step 2. Calculate its molar mass. Molar mass = 65.7g 0.8220mol = 79.9 g/mol Step 3. Identify the element. Look in the Periodic Table for an element with atomic mass 79.9 u. It's bromine! Answer link WebMoles are small, dark marks that appear on the skin. They are usually round or oval in shape and are caused when the cells that produce pigment, called melanocytes, grow in … WebAnswer is (c) 2 moles of CaCO3 Explanation: The molecular mass of C₁₂H₂₂O₁₁ is = 12 (12) + 22 (1) + 11 (16) gm = 342 gm 0.2 moles of it weigh = 0.2 x 342 gm = 68.4gm The molar mass of CO₂ is = 12 + 2 (16) gm = 44gm 2 moles of it weigh = 2 x 44 = 88gm The molar mass of CaCO₃ weigh = 40 + 12 + 3 (16) = 100gm 2 mole of it weigh = 2 x 100 gm = … emoji gota negra