Question 4: C-An element is a substance made up of two or more different types of atoms that
are not chemically combined.
Question 5: Coke, Aluminum foil, chicken noodle soup, Gatorade
Answer :C) through transferring or sharing electrons
The branch of medicine that deals with the use of radioactive substances in research, diagnosis, and treatment.
C) medium.
The medium of a wave is any substance that carries the wave, or through which the wave travels.Ocean waves are carried by water, sound waves are carried by air, and. the seismic waves of an earthquake are carried by rock and soil.
Answer : The correct option is, 3.75 mole
Explanation : Given,
Moles of = 2.5 mol
The balanced chemical equation is:
From the balanced reaction we conclude that
As, 2 moles of produce from 3 moles of
So, 2.5 moles of produce from moles of
Therefore, the moles of initially present was, 3.75 moles.