Xander claims that since the model of the atom has been changed so many times, that means it is a weak model. Willow claims that the more a model has been examined and adjusted, the stronger it is. Who is correct and why?

Willow is correct because as things age and mature more, usually the more better they are.

Explanation:

To elaborate, you can perceive the development of the modern day atomic model as one aging and maturing. There's usually a correlation between age/maturity and knowledge, the same is true for the atomic model and other scientific theories.

answer: mole of the gas

answer: mole of the gasexplanation:

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.