Helium (He) has the lowest melting point of <span>-272.2 °C.</span>
They are the elements from scandium to copernicium. The elements between group 2 and group 3
Answer:
Boil it.
Explanation:
If you mean how to clean water to sanitize it you have to boil it.
Mole is equal to mass of the element divided by molar mass of the element. that is
mole=mass/molar mass
From periodic table calcium has a molar mass of 40 g/mol
moles is therefore =800g/40g/mol=20moles
