Calculate the molar mass of a gas which has a density of 1.798g/dm3 at 298K and 1.01×10^5 Nm^-2​

What are the two major rules associated with polarity

Which of these elements is a metal?

The table below shows the fossils found in various layers of an undisturbed rock: fossils in rock layers layer (from top) fossil in layer 1 a, c 2 e 3 a, d, f 4 b 5 f, c 6 d, b which is most likely an index fossil?