Question

a piece of iron has a volume of 25 cm ³ and mass 195 g find the density of iron in GCM - ³ kgm - ³

please answer as fast as you can please ​

Answer 1

Solution :-

Given ,

• Mass of iron = 195g
• Volume of iron = 25 cm³

We need to find ,

♦ Density in ,

• gcm⁻³
• kgcm⁻³

As we know that ,

Density = Mass/Volume

■ i) gcm⁻³

Since , the units are in g & cm⁻³

So , we don't need to convert the units .

⇒ Density = 195/25

⇒ Density = 7.8 gcm⁻³

■ ii) Kgm⁻³

Firstly we need to convert g → kg & cm⁻³ → m⁻³ because here units are different .

• 195g = 0.195 kg

• 25cm³ = 2.5 × 10⁻⁵ m³

Substituting we have ,

⇒ Density = 0.195 ÷ 2.5 × 10⁻⁵

⇒ Density = 7800 kgm⁻³

Hence ,

• Density in gcm⁻³ = 7.8 gcm⁻³
• Density in kgm⁻³ = 7800 kgm⁻³

Answer 2

Answer:

density = mass/ vol = 195/25= 7.8 g/cm^3

Explanation: