Answer:The answer is Rosalind Franklin
Explanation:It is the only option that would be correct because the last person had two people for Rosalind and James I think, but Rosalind is definitely the correct answer
Answer:
523.66g or 524g for proper sig figs
Explanation:
First you have to get the molar mass of MgCl2 which is 95.211g/mol. You can calculate this through added the atomic mass of one magesium atom and 2 chloride atoms. You then multiply the 5.50mol by the 95.211g/mol and that cancels out the unit of moles leaving only grams.
The answer to this is yes they are likely, true.
Symbol : O
Element Family : Oxygen Group or Chalcogens: Group 16 (VIA) - 6 valence electrons
Atomic Number : 8
Atomic Mass : 15.999 u
Answer:
Hydrogen, 0,2 mol
Explanation:
= 22, 4 l/mol
V () = 6,72 = 6,72 l
V () = 6,72 = 6,72 l
The formula is:
n =
n () = 6,72l /22,4 l/mol = 0,3 mol
n () = 6,72l /22,4 l/mol = 0,3 mol (the same)
But from the equation we get a proportion that 1 mol () - 3 mol ()
(we have more hydrogen than is need for the reaction)
So there is excess of
We only need = 0,1 mol ()
0,3 mol (hydrogen quantity we have) - 0,1 mol (hydrogen quantity we need for the reaction) = 0,2 mol (excess)
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