How long will it take for 16 grams of Ra-226 to break down until only 1.0 grams remain?​

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

When a scientific theory has been tested and proved by the scientific community, it becomes a law