What is the purest form of IRON

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?

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by