Answer: A. they are proven before being published and D. they are reviewed by experts
Explanation: Journals are the written documents in which the scientists jots down about his proven fact or theory which has resulted through various kinds of rigorous experiments and has also been reviewed by the scientists as well.
Before publishing any kind of own work, the scientists first try to explain it which results in experimentation. After than, it would be reveiwed through his senior authoritites like senior scientists, who will remark it and will try to modify it or amend it if they would find any kind of mistake.
After the last verdicts from the scientist , it would go for the publication.
NaHCO3 sodium bicarbonate is baking soda; added to the acetic acid, it forms sodium acetate (aqueous), CO2 gas & water. Remove the water & solid sodium acetate remains.
