A piece of wood has a mass of 2.85 g; when placed in 20.0 mL of water, the water volume increased to 23.4 mL. What is the density of this piece of wood?

Answer Units

d = 0.84 g/cm³

Explanation:

Given data:

Mass of wood = 2.85 g

Volume of water = 20.0 mL

Volume of water + wood = 23.4 mL

Density of wood = ?

Solution:

Volume of wood = (Volume of water + wood ) - Volume of water

Volume of wood = 23.4 mL - 20.0 mL

Volume of wood = 3.4 mL

1 mL = 1 cm³

Density of wood:

d = m/v

d =  2.85 g / 3.4cm³

d = 0.84 g/cm³

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3. c) iron and nickel.