Answer: Dmitri Mendeleev
Explanation: He invented it, since he wanted to arrange all the elements.
Answer:
A
Explanation:
Because you need to multiply the length value by 1000
We know from the formula of Cr₂Cl₃, that each mole of the compound consists of 2 moles of Cr. Thus,
moles of Cr = moles of Cr₂Cl₃ x 2
= 0.3155 x 2
= 0.631 mole of Cr
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