Answer:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=2ahUKEwie2-mVj7vnAhVZCTQIHZu_C_oQFjABegQIBBAB&url=https%3A%2F%2Fbrainly.com%2Fquestion%2F10678573&usg=AOvVaw0r9hUMT8WrZ96qbkRaSJpX
Explanation:
What caused agriculture to change in Britain leading to urbanization? Check all that apply.
Answer:
Electrons
Explanation:
Atoms both have negative and positive particles
Protons are positive
Electrons are negative
Neutrons are neutral
Nuclei is where you find both neutrons and protons in an atom
Tectonic plate shifting...
Answer:
28.11g
Explanation:
Step 1:
Background understanding:
From Avogadro's hypothesis, 1 mole of any substance contains 6.02x10^23 atoms. This also indicates that 1 mole of helium (He) contains 6.02x10^23 atoms.
1 mole of He = 4g
Step 2:
Determination of the mass of He that contain 4.23x10^24 atoms. This is illustrated below:
4g of He contains 6.02x10^23 atoms.
Therefore Xg of He will contain 4.23x10^24 atoms i.e
Xg of He = (4x4.23x10^24)/6.02x10^23
Xg of He = 28.11g
Therefore, 28.11g of He contains 4.23x10^24 atoms
