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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-example-1

1 Answer

3 votes

Answer:

1st Blank: 1 Co

2nd Blank: 2 Na2S

3rd Blank: 4 Na

4th Blank: 1 CoS2

Step-by-step explanation:

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User Rmalchow
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