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HelloCthulhu
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Homework Statement
How many moles of electrons are in 1mL of H2O
Homework Equations
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1mL = 1g
moles to grams conversion - moles x molar mass = grams
mass of 1 electron = 9.109382 x 10-28g
moles to molecules = number of moles x avogadro's number (6.022140857 × 1023)
The Attempt at a Solution
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Molar mass of H2O
H = 1g, O = 16g, H2O = 18g
Number of electrons in 1 molecule of H2O
H = 1e−, O = 8e−, H2O = 10e−
Moles in 1g of H2O = 1g/18g = 0.0556M
Molecules in 0.0556M of H2O
0.0556M x (6.022140857 × 1023) = 3.348310835 x 1022 molecules
Number of electrons in 0.0556M of H2O
(3.348310835 x 1022) molecules x 10e− = 3.348310835 x 1023e−
Moles of electrons in 0.0556M of H2O
(3.0501042450753967 x 104g) of e− / 6.022140857 × 1023 = 0.5556M