# Answer to Question #68937 in Molecular Physics | Thermodynamics for DEEPENDRA SINGH

Question #68937

swarnbhashm is a cosmetic medicene in which found 400ppm colydee gold.what is the mass% of gold?

Expert's answer

Parts per million is the mass ratio between the pollutant component and the solution - and ppm is defined as

ppm = 1000000 m_c/m_s

where

mc = mass of component (kg)

ms = mass of solution (kg)

Percent concentration by mass is defined as the mass of solute divided by the total mass of the solution and multiplied by 100%. So,

c %=m_solute/m_solution ∙100%

Thus,

c %=ppm/1000000∙100%=400/1000000∙100%=400/10000=0.04%

Answer: 0.04%

ppm = 1000000 m_c/m_s

where

mc = mass of component (kg)

ms = mass of solution (kg)

Percent concentration by mass is defined as the mass of solute divided by the total mass of the solution and multiplied by 100%. So,

c %=m_solute/m_solution ∙100%

Thus,

c %=ppm/1000000∙100%=400/1000000∙100%=400/10000=0.04%

Answer: 0.04%

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