Question

What is the density of water at 1 atmospheric pressure and 30 degree?

Answer 1

D = PM ÷ R T
P= pressure = 1 atm
M = molecular mass = 18 g
R = 0.0821 atm dm3 / mole kelvin
T = temperatue = 30°c = 30 + 273= 303kelvin
D = 1 × 18 ÷ ( 0.0821 × 303 )
D = 18 ÷ 24.87
D = 0.7235 g / dm3

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