Answer:
mole
Explanation:
is a unit of amount of substance in the International System of Units, defined (since 2019) by fixing the Avogadro constant at the given value. Sometimes, the amount of substance is referred to as the chemical amount
D= M/V so, D=300/40 wich is 7.5 so D= 7.5g/m3
<span>40 20Ca this is the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX</span><span />
Answer:
The iron core, copper wire, and an electricity source.
Explanation: Me
