Answer:
Hints
concentration=density×%by mass
Molarity= concentration/molar mass
Molality=no of moles/mass of solvent in kg
Mass of solvent is of water given by=density of water×volume of container
Solved
Molar mass NH4Cl = <span>53.491 g/mol
number of moles solute :
n = m / mm
n = 20 / 53.491
n = 0.373 moles
solvent in kg :
13.9 / 1000 => 0.0139 kg
Therefore:
m = moles / volume
m = 0.373/ 0.0139
=> 26.83 molal
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Answer:
Diversity is the correct option.
The formula for finding Density is Mass over Volume.
Explanation:
So 35g over 25ml
Answer:
the ander is B. 6 neurons