Answer the following question attached!!

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

Sugar is dissolved in water. which is the solute? sugar neither both water

How many moles of oxygen gas are produced from the decomposition of six moles of potassium