Question

How many moles are there in 987 grams of Ra(OH)2? id also love to know the simplest equation for converting moles --> so i could practice on my own :)

Answer 1

Mole =
`(mass)/(molar mass)`

Mass of Radium Hydroxide = 987g
Molar Mass of
`Ra(OH) _(2)` = ((226) + (2 * 16) + (2 * 1))
= 260 g / mol

∴ Moles of
`Ra(OH) _(2)` =
`(987 g )/( 260 g / mol )`
= 3.796 mols