One mole of Ca is equal to how many atoms

1 mole of calcium contains 6.023 atoms.

Explanation:

1 mole is the amount of a substance that contains exactly constituent particles. 1 mole of a substance is always equal to the atomic mass of the element.

Hence, 1 mole of calcium will also have atoms.

Number of atoms in 1 mole calcium = 6.023 atom

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it