Conservation of mass
This scientific law states that matter cannot be created or destroyed in a chemical reaction.
What is the Law of Conservation of Mass?
This type of reaction occurs when propane (C3H8) burns in oxygen to form carbon dioxide and water.
What is a combustion reaction?
A chemical equation is balanced when the number of these is the same on both sides.
What are atoms?
Burning fossil fuels releases this gas, which contributes to climate change.
What is carbon dioxide?
When table salt is formed from sodium and chlorine, its properties are very different from the original elements. This is an example of what type of change?
What is a chemical change?
When wood burns in a fire, it turns into ash and smoke. Explain why the total mass remains the same.
What is the mass of the wood is converted into gases and ash, meaning no matter is lost, just changed in form?
Identify one of the products formed when propane (C3H8) combusts in oxygen.
What is carbon dioxide or water?
Balance this equation: Fe + O2 → Fe2O3.
What is 4Fe + 3O2 → 2Fe2O3?
Excessive greenhouse gases in the atmosphere lead to this global issue.
What is global warming?
In the formula CH4, the "C" represents carbon, and the "4" tells us this about hydrogen.
What is there are four hydrogen atoms?
After melting an ice cube, the liquid water weighs the same as the ice cube before it melted. Explain why.
What is because the total amount of matter stays the same, only changing from solid to liquid?
The process of rust forming on a bicycle left outside is an example of this type of reaction.
What is an oxidation reaction?
The chemical equation for aluminum reacting with chlorine gas is __Al + __Cl2 → __AlCl3. Fill in the missing coefficients.
What is 2Al + 3Cl2 → 2AlCl3?
When pollution mixes with water in the atmosphere, it creates precipitation that can damage statues, buildings, and forests.
What is acid rain?
The numbers in a chemical formula indicate this about the elements in a compound.
What is the ratio of atoms in the compound?
A scientist carefully measures the mass of vinegar and baking soda before and after mixing them together. The total mass stays the same. What does this demonstrate?
What is the Law of Conservation of Mass?
This metal is used in soda cans and reacts with chlorine gas to form a white compound.
What is aluminum?
This step-by-step process ensures that an equation follows the Law of Conservation of Mass.
What is balancing a chemical equation?
The burning of fossil fuels can lead to increased air pollution, which may cause this harmful condition affecting human lungs.
What is respiratory disease or asthma?
In cellular respiration, glucose (C6H12O6) and oxygen (O2) react to form these two products.
What are carbon dioxide and water?
A sealed container of water is heated until it completely turns into steam. What will happen to the total mass inside the container?
What is it will stay the same because the water only changed state?
What is cellular respiration?
The equation Na + Cl2 → NaCl is unbalanced. Balance it.
What is 2Na + Cl2 → 2NaCl?
Vehicles and factories release gases that react in the atmosphere to cause respiratory problems and environmental damage.
What is air pollution?
A chemical equation is unbalanced if it violates this scientific principle.
What is the Law of Conservation of Mass?