WorksheetsReactants, Products, & Leftovers
Total questions: 15
Worksheet time: 8mins
What does the law of conservation of mass state?
Matter can be created or destroyed in a chemical reaction.
The total mass of matter before a reaction is different from the total mass after.
Matter cannot be created or destroyed in a chemical reaction.
The mass of products is always less than the mass of reactants.
In the example of burning wood, what are the products formed?
Ashes, carbon dioxide, and water vapor
Oxygen and carbon dioxide
Ashes and oxygen
Water vapor and oxygen
What represents the reactants in the sandwich-making example?
Bread and cheese
Bread and butter
Cheese and ham
Bread and lettuce
What does the sandwich represent in the chemical reaction analogy?
Reactants
Products
Leftovers
Catalyst
According to the text, what happens to the mass of wood when it burns?
It disappears completely.
It is converted into energy.
It remains the same as the mass of the products.
It increases.
What is demonstrated by the example of making sandwiches?
Law of conservation of energy
Law of conservation of mass
Law of conservation of momentum
Law of conservation of charge
What is the main concept discussed in the text?
Chemical bonding
Conservation of mass
Conservation of energy
Chemical equilibrium
What happens to matter during a chemical reaction according to the law of conservation of mass?
It is destroyed.
It changes form but the total mass remains the same.
It is created.
It disappears.
In the burning wood example, what is the role of oxygen?
Product
Reactant
Catalyst
Inhibitor
What is the significance of the law of conservation of mass in chemical reactions?
It allows for the creation of new matter.
It ensures the mass of reactants equals the mass of products.
It destroys excess matter.
It changes the mass of products.
What does the text suggest about the mass of reactants and products?
The mass of reactants is always greater.
The mass of products is always greater.
The mass of reactants equals the mass of products.
The mass of reactants is always less.
What happens to the mass of matter before and after a chemical reaction?
It increases.
It decreases.
It remains the same.
It fluctuates.
What is the role of bread and cheese in the sandwich analogy?
Products
Reactants
Catalysts
Inhibitors
What does the text imply about the disappearance of wood during burning?
It is completely destroyed.
It is converted into energy.
Its mass is still present in the form of ashes and gases.
It becomes invisible.
What is the purpose of the examples given in the text?
To demonstrate the creation of matter
To illustrate the law of conservation of mass
To show the destruction of matter
To explain chemical bonding
