Respuesta :
Answer:
3.84mol
Explanation:
How many moles are in 987 grams of Ra(OH)2
the elements in the compound are as follows
radium
oxygen
and hydrogen
to get the the mole, we say the ratio of mass of the compound to the molecular mass(g/mol)
molecular mass= 223 + 16 * 2 + 1 * 2 =257 g/mol
mass=987g is defined as the quantity of matter in a body
mol=987/257
mol=3.84mol
mol has to do with the amount of a substance.