Juliebanana Juliebanana

02-01-2017
Mathematics

contestada

What is the correct formula for calcium cyanide? A. Ca(CN)2 B. CN(Ca)2 C. Ca2CN D. CaCN

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forngamer forngamer

24-11-2020

Answer: It's A

Reason:

Calcium has an oxidation number of +2 that makes *(Ca)*

Cyanide has an oxidation number of -1 so it needs a base of 2 in parentheses

The 2 is to multiply (-1 x 2 = -2) while Ca is already +2 so it needs no base

-2+2=0

FINAL ANSWER IS *Ca(CN)2*

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