Question

A covex mirror has a focal length of 18 cm .the image of an objet kept in front of the object . what ia the distance of the objet from the mirror?​

Answer 1

Answer:

9cm

Explanation:

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Answer 2

answer to the question (how to find molecular mass of nacl)

Answer:

To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.

For example, the molar mass of NaCl can be calculated for finding the atomic mass of sodium (22.99 g/mol) and the atomic mass of chlorine (35.45 g/mol) and combining them. The molar mass of NaCl is 58.44 g/mol.

Explanation:

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