There are two isotopes of element A. Information about the two isotopes is shown in the table below.

Mass number of the isotope
6
7

Percentage abundance
92.5
7.5

Use the information in the table above above to calculate the relative atomic mass of element A.
Give your answer to 2 decimal places.













Relative atomic mass =

(4)

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Will mark brainliest26. which of these statements are true? (3 points)a. gases are compressibleb. gases fill their containers completelyc. the pressure of a gas is independent of the temperatured. gases have masse. gases exert pressuref. the pressure of a gas is dependent on the volumeg. gas pressure results from the collisions between gas particlesh. gases have a definite volume and shape

List four observations that indicate that a chemical reaction may be taking place