1. 1.204 x 1024 atoms He = ? moles He
1 answer:
Check your chemistry textbook (or class notes) concerning molar mass, then look up the value for oxygen.
Then divide Avogadro’s number into the given amount of atoms, to find the number of moles.
Then combine this result appropriately with the molar mass, and voilà!
…Then reconsider posting homework questions without showing the work you have already done.
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Gives the same result when an experiment is repeated.
Answer:
Electrons are found in shells or orbitals that surround the nucleus of an atom
Explanation:
2Al(s) + 3Cl₂ → 2AlCl₃
Forming the equation:
2(28) + 3(223) = ΔH + 2(111)
ΔH = 503 kJ
Writing this outside of the reaction equation:
ΔH = -503 kJ
Answer:
drought
Explanation:
droughts are long periods without water
Dmitri Mendeleev was the creator and therefore organizer of the periodic table.
