Percent Composition and Molar Mass of NiCl2

This video tutorial explains how to find the percent composition by mass of each element in nickel(II) chloride (NiCl2). It begins with calculating the molar mass of the compound, followed by determining the percent composition of nickel and chlorine individually. The process involves using the molar mass of each element, dividing by the total molar mass of the compound, and multiplying by 100 to get the percentage. The video concludes with a summary of the steps involved.

What is the main focus of the video?

• Determining the boiling point of NiCl2

• Finding the percent composition by mass of elements in NiCl2

• Calculating the density of NiCl2

• Explaining the chemical bonding in NiCl2

What is the molar mass of NiCl2?

• 35.45 g/mol

• 100.00 g/mol

• 129.59 g/mol

• 58.69 g/mol

How many nickel atoms are present in NiCl2?

• Three

• Four

• Two

• One

What is the percent composition of nickel in NiCl2?

• 54.67%

• 35.45%

• 58.69%

• 45.29%

What is the molar mass of chlorine used in the calculation?

• 58.69 g/mol

• 129.59 g/mol

• 100.00 g/mol

• 35.45 g/mol

How many chlorine atoms are present in NiCl2?

• Four

• Three

• Two

• One

What is the percent composition of chlorine in NiCl2?

• 58.69%

• 45.29%

• 54.67%

• 35.45%

What is the final step in finding the percent composition of an element in a compound?

• Adding the atomic masses of all elements

• Subtracting the atomic mass from the molar mass

• Multiplying the atomic mass by the number of atoms

• Dividing the atomic mass by the molar mass and multiplying by 100