Which statement is true according to dalton’s theory?
a.
atoms of different elements can join to form larger atoms.
b.
atoms can be subdivided into smaller particles.
c.
atoms of the same element differ in electric charge.
d.
atoms of the same element are exactly alike.

According to Dalton's theory:

1- Atoms can join to form compounds not atoms so A is wrong

2- Atoms are the smallest building blocks of  matters so it can not be subdivided into particles so B is wrong

3- He stated that all Atoms are identical in mass and properties ( charge and such) so C is wrong.

4- Atoms of the same element are exactly alike (True so it's D)

The correct answer is d

Since the pully is a simple machine so the mechanical advantage is a 1

Answershe should not have multiplied the sulfur atoms by the subscript 4