Hsuisiifi Sotheby’s udjhr
Answer:
Sublimation
Explanation:
Sublimation is when a substance goes from a solid to a gas, without going through a liquid phase. This is not a method for separation and purification.
Answer:
Mass on the moon is 5.1 kg.
Explanation:
Given mass on earth = 5.1 kg
acceleration due to gravity on moon = 1.6 ms⁻².
The mass on the moon does not change because mass is the quantity of matter in the body regardless of its volume or of any forces acting on it.
Whereas the weight of the object changed.
Weight is the the force exerted on a body which is related to mass and expressed as W = mg.
W = weight of object m = mass of object and g = gravitational force

N stands for newton unit of weight.
Thus mass of the object on moon is same as on earth which is 5.1 kg.
Answer:
It would take 9.54 x 10^15 years to count 1 mole of atoms which is 10^6 times the age of Earth.
Explanation: