Chemical Equations and Coefficients

This video tutorial by Budashan explains how to count atoms in chemical reactions and equations. It covers the concepts of subscripts and coefficients, the use of the distributive property, and how to determine if a chemical equation is balanced. The tutorial also addresses handling complex molecules with subscripts outside parentheses. The video concludes with encouragement to explore further learning resources.

What is the term for the small number in a chemical formula that indicates the number of atoms?

• Coefficient

• Exponent

• Multiplier

• Subscript

How do you determine the total number of atoms when both a coefficient and a subscript are present?

• Add the coefficient and subscript

• Multiply the coefficient by the subscript

• Divide the coefficient by the subscript

• Subtract the subscript from the coefficient

What is the result of multiplying a coefficient of 2 with a subscript of 3?

• 6

• 2

• 5

• 3

What is the purpose of using the distributive property in chemical equations?

• To multiply subscripts

• To divide molecules

• To distribute coefficients across subscripts

• To add coefficients

What is the first step in checking if a chemical equation is balanced?

• Count the total number of molecules

• Draw a line to separate reactants and products

• Multiply all subscripts by two

• Add coefficients to all elements

If a chemical equation is unbalanced, what must be adjusted to balance it?

• The subscripts

• The coefficients

• The yield sign

• The chemical symbols

In a balanced chemical equation, what should be equal on both sides?

• The number of coefficients

• The total mass

• The number of atoms of each element

• The number of molecules

What does a coefficient of 1 imply when not explicitly written in a chemical equation?

• It is doubled

• It is an understood one

• It is halved

• It is ignored

When a subscript is outside parentheses, to which elements does it apply?

• Only the first element inside the parentheses

• All elements inside the parentheses

• Only elements outside the parentheses

• All elements in the entire molecule

How many atoms of hydrogen are there in 3H2O?

• 3

• 6

• 2

• 9