Which two elements have similar characteristics ? indium, lithium, francium, niobium

Asmall amount of a solid is added to water. the observation made after fifteen minutes is shown in the figure. which of these solids has been probably added to water? a) oil b) sand c) sugar d) wood chips

What is the number of moles in 15.0 g ash3?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density