Question

plz fast give me answer​

Answer 1

Answer:

Mollusca => (c) soft bodied animals

Porifera => (a) pore bearing animals

Echinodermata => (d) spiny skinned animals

Arthropoda => (b) jointed legs

Answer 2

Your Last Question

What is a Chemical formula ? What rules should be followed while writing a Chemical formula ?

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short Answer

The correct formulas of the reactants are always written on the left side of the equation. The correct formulas of the products are always written on the right side of the equation. The reactants and products are separated by an arrow pointing toward the products.

Long Answer

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound ormolecule,using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes,

brackets, commas and plus (+) and minus (-)

signs.

The rule for writing chemical formula is as

follow:

Firstly, write the symbols with positive charge

valency first. Secondly, write the valency of

the top of its symbol.

each atom on

Thirdly, divide the valency number by their highest common factor ignore the positive or

negative radicle.

Interchange the valency of the radicle.

Lastly, write the interchanged valency number to the lower right of the radicle.

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