Liquid nitrogen boils at -195.8 degrees Celsius. Express the boiling point of li

Question

Liquid nitrogen boils at -195.8 degrees Celsius. Express the boiling point of liquid nitrogen in kelvin.

A) -77.4 K
B) -469.0 K
C) 469.0 K
D) all temperatures are on ) K on the Kelvin scale
E) 77.4 K


The density of lead is 11.4 g/cm3 at 25 degrees Celsius. Calculate the volume occupied by 25.0 g of lead.

A) 1.24 cm3
B) 285cm3
C) 2.19 cm3
D) 0.456 cm3
E) 6.05 cm3


The name for CuSO4 . 5H2O is

A) copper (V) sulfate hydrate
B) copper (II) sulfate pentahydrate
C) copper sulfate pentahydrate
D) copper (III) sulfate acid
E) copper sulfate acid

Explanation / Answer

Boiling point = -195.8 oC = (-195.8 + 273.15) K = 77.35 K

Lead
Volume = mass/density = 25/11.4 cm3 = 2.19 cm3

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