Hydroxide Ions and Molar Mass

This video tutorial explains how to calculate the molar mass of nickel(II) hydroxide (NiOH2). It begins by identifying the atomic masses of nickel, oxygen, and hydrogen from the periodic table. The tutorial then demonstrates the calculation process, including the multiplication of the hydroxide ion's mass by two, and adding it to the mass of nickel. The final molar mass is determined to be 92.71 grams per mole. The video concludes with a note on potential variations in results due to differences in periodic table precision.

What is the atomic mass of nickel as mentioned in the video?

• 1.01 grams per mole

• 16.00 grams per mole

• 58.69 grams per mole

• 92.71 grams per mole

Which elements are part of the hydroxide ion in Ni(OH)2?

• Nickel, Oxygen, and Hydrogen

• Nickel and Hydrogen

• Oxygen and Hydrogen

• Nickel and Oxygen

How many hydroxide ions are present in Ni(OH)2?

• Three

• Two

• One

• Four

What is the significance of the number 'two' in the chemical formula Ni(OH)2?

• It indicates two nickel atoms

• It indicates two hydroxide ions

• It indicates two hydrogen atoms

• It indicates two oxygen atoms

What is the molar mass of Ni(OH)2 as calculated in the video?

• 92.71 grams per mole

• 58.69 grams per mole

• 1.01 grams per mole

• 16.00 grams per mole

Why might the calculated molar mass differ slightly when using different periodic tables?

• Some tables exclude nickel

• Tables may have varying decimal places

• Different tables have different elements

• Tables use different units