Law of Conservation of Mass in Chemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Law of Conservation of Mass in Chemical Reactions starts at 9 and continues till grade 12.
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A reaction in a closed container starts with 40 g of reactants and ends with 40 g of products. What does this indicate about the Law of Conservation of Mass?
A reaction starts with 100 g of reactants. After the reaction, the products and container together weigh 100 g. What does this demonstrate?
A reaction vessel contains 50 g of reactants. After the reaction, the products are weighed and found to be 48 g. What could explain this difference?
A student burns 5 g of magnesium in air and obtains 8.3 g of magnesium oxide. What is the mass of oxygen that combined with magnesium?
A student mixes 25 g of solution A with 30 g of solution B in a closed container. After the reaction, what is the total mass of the mixture?
Describe an experiment that can be used to demonstrate the Law of Conservation of Mass.
Explain how the Law of Conservation of Mass is demonstrated in the reaction: Zn + 2HCl → ZnCl2 + H2.
Explain why chemical equations must be balanced according to the Law of Conservation of Mass.
Explain why mass appears to decrease when a gas is produced in an open reaction vessel.
If 10 g of hydrogen reacts with 80 g of oxygen to form water, what is the total mass of water formed?
If 15 g of sodium reacts with 23 g of chlorine to form sodium chloride, what is the mass of sodium chloride formed?
If 24 g of magnesium reacts with 16 g of oxygen to form magnesium oxide, what is the mass of magnesium oxide formed?
If 5 g of substance X reacts with 15 g of substance Y and forms 18 g of product Z, what is the mass of any other product formed?
If a chemical reaction appears to lose mass, what is the most likely explanation?
In a closed system, 20 g of calcium carbonate is heated and produces 11.2 g of calcium oxide and carbon dioxide gas. What is the mass of carbon dioxide produced?
In a reaction, 12 g of carbon reacts with 32 g of oxygen to form carbon dioxide. What is the mass of carbon dioxide formed?
In the reaction: 2H2 + O2 → 2H2O, if 4 g of hydrogen reacts with 32 g of oxygen, what is the mass of water produced?
State the Law of Conservation of Mass in your own words.
Who first stated the Law of Conservation of Mass?
Why is it important to use a closed system when demonstrating the Law of Conservation of Mass?
