How many moles are equal to 7.28 x 1025 atoms of an element?

#Use Avogadro

Number of atoms = mol × 6×10²³

7.28 × 10²⁵ = mol × 6×10²³

mol = (7.28×10²⁵) : (6×10²³)

mol = 121.3mol

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.