I think it would be 1, 4, 5! Also I love your profile picture!
Answer:
it means the earth is rotating-
Explanation:
That would be cause part of the sodium is pure and that means it still kind of has it properties when it was an element and that its i think.
Answer:

Explanation:
The molar mass of uranium-235 is 235 g/mol. So one mole of uranium-235 has a mass of 235 g. Put differently 6.022×10^23 atoms of uranium-235 have a mass of 235 g. Knowing that, how can we use that to find the mass of one atom?
mass of one atom = 