Answer:
total number of electron in 1 litter is 3.34 ×  electron
 electron
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 × molecules
 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 × × 1
 × 1
total number of electron in water is = 6.02× electron
 electron
and
we know 
mass = density × volume    ..........1
here we know density of water is 1000 kg/m
and volume = 1 litter = 1 ×  m³
 m³
mass of 1 litter = 1000 × 1 × 
mass = 1000 g 
so
total number of electron in 1 litter =  mass of 1 litter × 
total number of electron in 1 litter =  1000 × 
total number of electron in 1 litter is 3.34 ×  electron
 electron
 
        
             
        
        
        
A type of matter made up of a combination of elements is called a compound. for example table salt, is made up of two elements that by themselves are lethal but chemically combined cancel each other out there for becoming edible.