Question

5. Active mass means:(chemistry) ​

Answer 1

$\large{\green{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\underline{\underline{\underline{the \:effective\: concentration\: of \:a \:substance}}}}}}}}}}}}}}}$

the concentration of a reacting substance expressed usually in moles per litre