Respuesta :

Answer:

 .24 mg

Explanation:

The mineral contains .016 % silicon

mass of the mineral = 1.5 kg

mass of silicon = 1.5 x .016 %

= 1.5 x .016 / 100

= 24 x 10⁻⁵ kg

= 24 x 10⁻² mg

= .24 mg .