Weight = Mass x Acceleration due to gravity (W=mg) Weight is a measure of the Gravitational force between the object and
the earth. The acceleration of gravity on Earth is less
Weight is
measured in units of
If one object has more mass than another then it weighs (
more / less ) than the other object.
As an astronaut goes to the moon, his mass
but his
weight
This is because as he got further away from the Earth,
the acceleration of gravity

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

c

explanation: