Question

define relative density. the density of water is 1000kg/m3. if relative density of iron is 7.87 then calculate the density of iron.

Answer 1

Answer:

7870

Explanation:

density of iron = dens. of water × RD of iron

density of iron = dens. of water × RD of iron = 1000×7.87

density of iron = dens. of water × RD of iron = 1000×7.87 ::: = 7870

Answer 2

• Relative density of iron=7.87
• Density of water=1000kg/m^3
• Density of iron=?

We know.

$\boxed{\sf Relative\:Density=\dfrac{Density\:of\:substance}{Density\:of\:water\;at\:4°C}}$

$\\ \sf\longmapsto Density\:of\;iron=Relative\:Density\:of\:iron\times Density\:of\:water\:at\:4°C$

$\\ \sf\longmapsto Density\:of\:iron=7.87\times 1000$

$\\ \sf\longmapsto Density\:of\:iron=7870kg/m^3$