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18-01-2021
Chemistry

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Can someone help me with number 4? Please and thank you

Can someone help me with number 4 Please and thank you class=

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18-01-2021

Answer:

1st Blank: 1 Co

2nd Blank: 2 Na2S

3rd Blank: 4 Na

4th Blank: 1 CoS2

Explanation:

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