Which example has 1.2×10^24 hydrogen atoms? 2 moles of ammonia (NH3)

2 moles of hydrogen gas (H2)

1 mole of water (H2O)

1 mole of methane (CH4)

1 mole of water (H2O)

a. Five-year-old children have longer attention spans than three-year-old children.

Explanation:

The text shown in the question says that five-year-olds remained in the same game for as long as the game lasted. This is because five-year-olds can better understand what is happening around them, so they can focus more on one activity and devote their time to it. On the other hand, the text shows that three-year-olds do not behave the same as five-year-olds, because they cannot stay in one activity for a long time and keep playing games all the time.  This is because three-year-olds do not quite understand what is happening around them and therefore cannot concentrate easily.

With this we can conclude that five year olds have longer attention span than three year olds