Show the formation of oxygen molecule​

What is the theoretical yield of carbon dioxide? a)0.993 gb)2.98 gc)3.65 gd)8.93 g

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

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0