Moles and Charges in Compounds

The video tutorial explains how to calculate the number of moles of hydrogen in glucose and oxygen in nickel phosphate. It begins with an introduction to the concept of moles and the molecular structure of glucose, followed by a detailed breakdown of glucose into its constituent atoms. The tutorial then scales up the relationship between moles of glucose and hydrogen, providing a conversion factor for solving the problem. A similar approach is used to determine the moles of oxygen in nickel phosphate, including deriving the compound's formula and applying a conversion factor.

What is the main focus of the initial problem discussed in the video?

• Determining moles of carbon in glucose

• Determining moles of nitrogen in glucose

• Determining moles of hydrogen in glucose

• Determining moles of oxygen in glucose

How many hydrogen atoms are present in one molecule of glucose?

• 6

• 24

• 18

• 12

What is the relationship between moles of glucose and moles of hydrogen?

• 1 mole of glucose gives 6 moles of hydrogen

• 1 mole of glucose gives 12 moles of hydrogen

• 1 mole of glucose gives 18 moles of hydrogen

• 1 mole of glucose gives 24 moles of hydrogen

How many moles of hydrogen are contained in 0.075 moles of glucose?

• 0.45 moles

• 0.75 moles

• 1.05 moles

• 0.90 moles

What is the charge of nickel in nickel(II) phosphate?

• +4

• +3

• +2

• +1

What is the charge of the phosphate ion in nickel(II) phosphate?

• -3

• -2

• -1

• -4

How many nickel ions are needed to balance the charge with two phosphate ions?

• 3

• 2

• 1

• 4

How many oxygen atoms are present in one formula unit of nickel(II) phosphate?

• 6

• 8

• 4

• 10

What is the conversion factor for moles of oxygen in nickel(II) phosphate?

• 1 mole of nickel(II) phosphate gives 10 moles of oxygen

• 1 mole of nickel(II) phosphate gives 4 moles of oxygen

• 1 mole of nickel(II) phosphate gives 6 moles of oxygen

• 1 mole of nickel(II) phosphate gives 8 moles of oxygen

How many moles of oxygen are in 2.45 moles of nickel(II) phosphate?

• 16.4 moles

• 18.6 moles

• 20.4 moles

• 19.6 moles