What is the total amount of energy required to remove the most loosely bound electron from each atom in a mole of gaseous ca

589.8 kJ/mol

Explanation:

Let's consider the process in which the most loosely bound electron from each atom in a mole atom of gaseous calcium is removed.

Ca(g) + Energy ⇒ Ca¹⁺(g) + 1 e⁻

The energy involved in this process is known as First Ionization Energy. The First Ionization Energy for calcium is 589.8 kJ/mol.

b i think it’s a water wheel turning in a stream

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e