<span>136.14 g/mol </span><span><span>Calcium sulfate, Molar mass</span></span>
Answer:
The molar mass of Pb(Cr2O7)2 is 639.2 g/mol.
Atoms are made up of three subatomic particles called protons, neutrons, and electrons.
Protons and neutrons are located in the nucleus.
All protons have a positive charge.
All neutrons have no charge or are neutral.
Electrons orbit around the nucleus and have a negative charge.
Answer:
only one atom of that element
Explanation:
Example:
H2 O has two hydrogenatoms and ONE Oxygen atom
