คำแนะนำของผู้เขียน
You are to balance the chemical equations by entering the co-efficients in the boxes.
You must enter the number 1 for all co-efficients that you have not changed
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คำแนะนำของผู้เขียน
You are to balance the chemical equations by entering the co-efficients in the boxes.
You must enter the number 1 for all co-efficients that you have not changed
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