1 mole NaCl = 58.443g NaCl = 6.022 x 1023 formula units NaCl
3 x 1025 formula units NaCl x 1mol NaCl/6.022 x 1023 formula units NaCl x 58.443g NaCl/mol NaCl = 2911g NaCl = 3000g NaCl (rounded to 1 significant figure)
The gram formula unit mass of sodium chloride is 58.443, and every gram formula unit mass contains Avogadro's Number, 6.022 X 1023 formula units. Therefore, the mass sought is 58.443 X (4.59 X 1024)/(6.022 X 1023) or 445 grams, to the justified number of significant digits.
7 atoms.
Glucose and sodium chloride behave differently osmotically because each formula unit of glucose behaves as a single osmotically active unit, but each formula unit of sodium chloride behaves as two osmotically active units: Each formula unit dissociates in solution into two ions, and the two ions act as osmotically independent units.
How many formula units of sodium acetate are in 0.87 moles of sodium acetat
Sodium chloride is an ionic crystalline salt, and does not form molecules. One unit of sodium chloride is called a functional unit. It is the lowest whole number ratio of ions represented in an ionic compound. 1 mole = 6.022 x 1023 formula units of NaCl 3 moles NaCl x 6.022 x 1023 formula units/mole = 1.8 x 1024 formula units of NaCl
8
A same number.
The gram formula unit mass of sodium chloride is 58.443, and every gram formula unit mass contains Avogadro's Number, 6.022 X 1023 formula units. Therefore, the mass sought is 58.443 X (4.59 X 1024)/(6.022 X 1023) or 445 grams, to the justified number of significant digits.
7 atoms.
Formal set up. 10 grams sodium chloride (1 mole NaCl/58.44 grams)(1 mole Na/1 mole NaCl)(6.022 X 1023/1 mole Na) = 1.0 X 1023 atoms of sodium --------------------------------------
Sodium chloride "formula units" form a very large lattice.
Glucose and sodium chloride behave differently osmotically because each formula unit of glucose behaves as a single osmotically active unit, but each formula unit of sodium chloride behaves as two osmotically active units: Each formula unit dissociates in solution into two ions, and the two ions act as osmotically independent units.
How many formula units of sodium acetate are in 0.87 moles of sodium acetat
No: Each "mole", more precisely called "formula mass", of sodium chloride contains two ions, as shown by its formula NaCl, but each formula mass of magnesium chloride has three ions as shown by its formula MgCl2. This is true because sodium cations have only one positive electric charge unit, magnesium cations have two electric charge units, and chloride ions have one negative electric charge unit each.
Sodium chloride is an ionic crystalline salt, and does not form molecules. One unit of sodium chloride is called a functional unit. It is the lowest whole number ratio of ions represented in an ionic compound. 1 mole = 6.022 x 1023 formula units of NaCl 3 moles NaCl x 6.022 x 1023 formula units/mole = 1.8 x 1024 formula units of NaCl
The molecular mass is the sum of the atomic weights of the contained elements in the formula unit. 22,98976928 (atomic weight of Na) + 35,45 (conventional atomic weight of chlorine) = 58,43976928
Magnesium chloride (MgCl2) has a molecular weight of 95.21 grams per mole. 11.6 grams of MgCl2 is therefore .122 moles.