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Water has a mass per mole of 18.0 g/mol, and each water molecule (H20) has 10 electrons. (a) How many electrons are there in one liter (1.00 x 10 m ) of water?

User Prasanna
by
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1 Answer

6 votes

Answer:

total number of electron in 1 litter is 3.34 ×
10^(26) electron

Step-by-step explanation:

given data

mass per mole = 18 g/mol

no of electron = 10

to find out

how many electron in 1 liter of water

solution

we know molecules per gram mole is 6.02 ×
10^(23) molecules

no of moles is 1

so

total number of electron in water is = no of electron ×molecules per gram mole × no of moles

total number of electron in water is = 10 × 6.02 ×
10^(23) × 1

total number of electron in water is = 6.02×
10^(24) electron

and

we know

mass = density × volume ..........1

here we know density of water is 1000 kg/m

and volume = 1 litter = 1 ×
10^(-3)

mass of 1 litter = 1000 × 1 ×
10^(-3)

mass = 1000 g

so

total number of electron in 1 litter = mass of 1 litter ×
(molecules per gram mole)/(mass per mole)

total number of electron in 1 litter = 1000 ×
\frac{6.02*10{24}}{18}

total number of electron in 1 litter is 3.34 ×
10^(26) electron

User ShashankAC
by
8.5k points

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