Please help me on the following questions; How many moles are found in 2.06 x 10^23 molecules of carbon monoxide?

How many moles are found in 8.70 x 10^25 atoms of Zinc?

How many moles are found in 1.44 x 10^22 formula units of salt? How many moles are found in 3.00 x 10^23 atoms of krypton?

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Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Label a-f based on the table using c for concentrated and d for dilute

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains