Question

b) The mass of 2 liters of ethanol is 1580 grams. Calculate the density of ethanol in (a) CGS and (b)

SI system​

Answer 1

Answer:

a) 0.79 g/cm³

b) 790 kg/m³

Explanation:

Given:

• Volume of ethanol = 2 litres

        1 litre = 1000 cm³ = 0.001 m³

        2 litres = 2000 cm³ = 0.002 m³

• Mass of ethanol = 1580 grams = 1.58 kg

To find:

• Density of ethanol

Method to find:

a) In CGS System  (Centimetre, Gram, Second):

$Mass = Volume * Density$

1580 = 2000 * Density

⇒ Density = 1580/2000

⇒ Density = 0.79 g/cm³

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b) In S.I System:

$Mass = Volume * Density$

⇒ 1.58 = 0.002 * Density

⇒ Density = 1.58/0.002

⇒ Density = 790 kg/m³

Hope it helps!