How many molecules are in 15.3 moles of cu(no3)2

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum

How are the terms group and period used on the periodic table