Which complication of diabetes can be treated with hyperbaric oxygen?.

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

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Why is the melting of ice a physical change ?