Question

Fill in the blanks:

i) Symbol represents........atom(s)of an element.

ii) Formula of iron (III) carbonate is..........

iii) In exothermic reaction,.......... of heat occurs.

iv) Formula of ferrocyanide is ....... and formula of limestone is ..........​

Answer 1

1) number of, 2)Fe3co^-2,3)amount,4)c6Fek4n6,ca(oh)2

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Answer 2

Answer:

i) A chemical symbol represents a single atom of an element: H a single hydrogen atom. C a single carbon atom.

ii)Formula of iron (III) carbonate is Fe2(CO3)3

iii)An exothermic reaction is a chemical reaction that releases heat. It gives net energy to its surroundings. That is, the energy needed to initiate the reaction is less than the energy released.

iv)Ferrocyanide

PubChem CID:9552077

Molecular Formula:.C6FeN6-4

Synonyms:FERROCYANIDE Hexacyanoferrate(II) Hexacyanoferrate II Hexazyanoferrat(II) hexacyanoferrate(4-) More...

Molecular Weight: 211.95 g/mol

Component Compounds: CID 23925 (Fe) CID 768 (Hydrogen cyanide)

limestone

Calcite is a form of calcium carbonate with the chemical formula CaCO3. In other words, calcite is composed of a basic structure of one atom of calcium, one atom of carbon and three atoms of oxygen.

Explanation:

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