2. Atoms & Elements
Law of Conservation of Mass
2. Atoms & Elements
Law of Conservation of Mass - Video Tutorials & Practice Problems
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"In a chemical reaction, no matter is created or destroyed, but instead changes form."
Lavoisier's Conservation of Mass
1
concept
Law of Conservation of Mass
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According to Lavoisier, all reactants are completely converted into products.
2
example
Law of Conservation of Mass Example 1
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1mPlay a video:
3
Problem
ProblemFollowing the Law of Conservation of Mass, predict the minimum amount of nitrogen that will react with 50.0 grams of hydrogen to produce 92.5 grams of ammonia.
Nitrogen + Hydrogen → Ammonia
A
42.5 g
B
45.91 g
C
46.25 g
D
50.0 g
4
Problem
ProblemPredict the amount of oxygen gas that will remain after the reaction of 112.6 grams of calcium with 24.0 grams of oxygen.
A
8.5 g
B
11.0 g
C
18.0 g
D
24.0 g
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PRACTICE PROBLEMS AND ACTIVITIES (18)
- Write 'true' or 'false' for each statement. (b) If the reaction 2 O3(g)S 3 O2(g) goes to completion and all O...
- An automobile gasoline tank holds 21 kg of gasoline. When the gasoline burns, 84 kg of oxygen is consumed, and...
- Assume that the mixture of substances in drawing (a) undergoes a reaction. Which of the drawings (b)–(d) rep-r...
- A sample of nitrosyl bromide (NOBr) decomposes according to the equation 2 NOBr1g2 Δ 2 NO1g2 + Br21g2 An equil...
- A sample of mercury with a mass of 114.0 g was combined with 12.8 g of oxygen gas, and the resulting reaction ...
- A sample of CaCO3 was heated, causing it to form CaO and CO2 gas. Solid CaO remained behind, while the CO2 esc...
- One of the steps in the commercial process for converting ammonia to nitric acid is the conversion of NH3 to N...
- If the mass of the products measured 120 g, what would be the mass of the reactants?
- Which best represents the law of conservation of mass?a. mass of reactants > mass of products b. mass of re...
- Why does the mass of a substance remain the same after a chemical reaction?
- The law of conservation of matter states that during a chemical reaction, the amount of matter
- What is the law of conservation of matter, and how does it apply to chemical reactions?
- How can the law of conservation of mass apply to a burning log, if all that remains of it is ash?
- Which of the following is true about the mass of the reactants in a chemical reaction?
- The law of conservation of mass is best described as which of the following statements?
- What is the law of conservation of matter, and how does it apply to chemical reactions?
- Which chemical equation shows that the total mass during a chemical reaction stays the same?
- What does the principle of conservation of matter say? How is this related to Earth's plates?