Understanding Magnesium Nitrate Composition

The video tutorial explains how to determine the number of atoms in magnesium nitrate, Mg(NO3)2. It begins by identifying the elements present: magnesium, nitrogen, and oxygen. The tutorial then demonstrates how to calculate the total number of atoms in the compound by considering subscripts and parentheses. It further explains how to find the number of atoms in one mole of magnesium nitrate using Avogadro's number. The video concludes with a summary of the atom counting process.

Which elements are present in magnesium nitrate?

• Magnesium, Carbon, Oxygen

• Magnesium, Nitrogen, Oxygen

• Magnesium, Nitrogen, Hydrogen

• Magnesium, Sulfur, Oxygen

What is the assumed subscript for magnesium in Mg(NO3)2?

• Zero

• Three

• One

• Two

How many nitrogen atoms are there in Mg(NO3)2?

• One

• Four

• Two

• Three

What is the total number of atoms in magnesium nitrate?

• Eight

• Seven

• Ten

• Nine

How many oxygen atoms are present in magnesium nitrate?

• Four

• Six

• Three

• Five

How do you calculate the number of nitrogen atoms in one mole of magnesium nitrate?

• Multiply one by Avogadro's number

• Multiply three by Avogadro's number

• Multiply four by Avogadro's number

• Multiply two by Avogadro's number

What is Avogadro's number approximately?

• 6.02 x 10^22

• 6.02 x 10^23

• 6.02 x 10^24

• 6.02 x 10^25

How many magnesium atoms are there in one mole of magnesium nitrate?

• 6.02 x 10^25

• 6.02 x 10^22

• 6.02 x 10^23

• 6.02 x 10^24