The concentration of sodium chloride in units of weight/volume percent is 3.93g/ml
Given that
3.93 (w/v) NaCl
Weight NaCl = 3.14g
Volume of water = 79.9mL
W/V is usually represented in g/mL, so no need to change anything
3.14g/79.9mL *100 = 3.93 g/mL (%)
One mole of NaCl contains 6.022 x 10 23 NaCl formula units.
• Use the mole quantity to count formulas by weighing them.
• Mass of a mole of particles = mass of 1 particle x 6.022 x 1023
• The mass of an atom in amu is numerically the same
as the mass of one mole of atoms of the element in grams.
• One atom of sulfur has a mass of 32.07 amu;
one mole of S atoms has a mass of 32.07 g.
Mass of 1 H atom: 1.008 amu x 1.661 x10-24 g/amu = 1.674 x10-24 g
Mass of 1 mole of H atoms:
1.674 x10-24g/H atom x 6.022 x1023H atoms = 1.008 g
Learn more about Weight / volume Percentage here
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