no.of moles= mass/ Mr
=1200/(54.9*3)+7[32.1+(16*4)]
=1.433
They are called ISOTOPES.
:)
Matter is anything that has mass and volume
A molecule with two strong bond dipoles can have no molecular dipole if the bond dipoles cancel each other out by pointing in exactly opposite directions. For example, in carbon dioxide (a linear molecule), the carbon-oxygen bonds have a <span>large dipole moment. However, because one dipole points to the left and the other to the right the dipole is cancelled.</span>
