2. Atoms & Elements

Law of Conservation of Mass

Vacation or Conservation (Of Mass): Crash Course Kids #23.1

According to Lavoisier, all reactants are completely converted into products.

Assume that the mixture of substances in drawing (a) undergoes a reaction. Which of the drawings (b)–(d) rep-resents a product mixture consistent with the law of mass conservation? <img src="https://lightcat-files.s3.amazonaws.com/problem_images/9cd5ba885306c9b4-1668092718027.jpg" alt="" />
(b) <img src="" alt="" />
(c) <img src="" alt="" />
(d) <img src="" alt="" />

Following 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

Predict the amount of oxygen gas that will remain after the reaction of 112.6 grams of calcium with 24.0 grams of oxygen.<img src="https://static.studychannel.pearsonprd.tech/courses/general-chemistry/thumbnails/images/3bfdbe6b"class="fr-fic fr-dii">

A sample of mercury with a mass of 114.0 g was combined with 12.8 g of oxygen gas, and the resulting reaction gave 123.1 g of mercury(II) oxide. How much oxygen was left over after the reaction was complete?

Law of Conservation of Mass Word Problems

Law of Conservation of Mass Example 1

A hydrogen-filled balloon is ignited and 1.50 g of hydrogen is
reacted with 12.0 g of oxygen. How many grams of water vapor
form? (Assume that water vapor is the only product.)

What Is The Law of Conservation of Mass | Properties of Matter | Chemistry | FuseSchool

One of the steps in the commercial process for converting
ammonia to nitric acid is the conversion of NH3 to NO:
4 NH31g2 + 5 O21g2¡4 NO1g2 + 6 H2O1g2
In a certain experiment, 2.00 g of NH3 reacts with 2.50 g of
O2. (d) Show that your calculations in parts (b) and (c)
are consistent with the law of conservation of mass.

Write “true” or “false” for each statement. 
(b) If the reaction 2 O3(g)S 3 O2(g) goes to completion
and all O3 is converted to O2, then the mass of O3 at
the beginning of the reaction must be the same as the mass
of O2 at the end of the reaction.

An automobile gasoline tank holds 21 kg of gasoline. When the
gasoline burns, 84 kg of oxygen is consumed, and carbon dioxide
and water are produced. What is the total combined mass of
carbon dioxide and water that is produced?

Law of Conservation of Mass - Fundamental Chemical Laws, Chemistry

The Law of Conservation of Matter

Law of Conservation of Mass | Don't Memorise

A sample of nitrosyl bromide (NOBr) decomposes according
to the equation
2 NOBr1g2 Δ 2 NO1g2 + Br21g2
An equilibrium mixture in a 5.00-L vessel at 100 C contains
3.22 g of NOBr, 3.08 g of NO, and 4.19 g of Br2.
(c) What was the mass of the original
sample of NOBr?

 In a chemical reaction, matter is neither created nor destroyed. 

 In a chemical reaction, energy is neither created nor destroyed. 

 You may be thinking about the law of conservation of energy. 

 All samples of a given compound have the same proportions of their constituent elements. 

 You may be thinking about the law of definite proportions. 

 When two elements form two different compounds, the masses of the elements can be expressed as a ratio of small whole numbers. 

 You may be thinking about the law of multiple proportions. 

 All samples of a given compound have the same masses of their constituent elements. 

You may be thinking about the law of definite proportions but this law addresses the same proportions of constituent elements.

 Think about the meaning of the word conservation. 

 The law of conservation of mass states: 

The law of conservation of mass - Todd Ramsey

A sample of CaCO3 was heated, causing it to form CaO and CO2 gas. Solid CaO remained behind, while the CO2 escaped to the atmosphere. If the CaCO3 weighed 612 g and the CaO weighed 343 g, how many grams of CO2 were formed in the reaction?

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Professor Dave Explains

1. Intro to General Chemistry

3. Chemical Reactions

4. BONUS: Lab Techniques and Procedures

5. BONUS: Mathematical Operations and Functions

6. Chemical Quantities & Aqueous Reactions

7. Gases

8. Thermochemistry

9. Quantum Mechanics

10. Periodic Properties of the Elements

11. Bonding & Molecular Structure

12. Molecular Shapes & Valence Bond Theory

13. Liquids, Solids & Intermolecular Forces

14. Solutions

15. Chemical Kinetics

16. Chemical Equilibrium

17. Acid and Base Equilibrium

18. Aqueous Equilibrium

19. Chemical Thermodynamics

20. Electrochemistry

21. Nuclear Chemistry

22. Organic Chemistry

23. Chemistry of the Nonmetals

24. Transition Metals and Coordination Compounds

[BOOK CHEM] Clutch Version

Millikan Oil Drop Experiment

The Oil Drop Experiment helped with determining the fundamental charge of the electron.&nbsp;

Ions

Ions represent elements that possess either a positive charge or a negative charge.&nbsp;

Periodic Table: Charges

Elements lose or gain electrons to have the ideal number of outer shell electrons like the noble gases.&nbsp;

Law of Definite Proportions

"Different samples of a pure chemical compound always contain the same proportions of elements by mass."

Periodic Table: Classifications

The Periodic Table contains 3 Major Classifications when describing its elements

Isotopes

Isotopes are atoms of an element that have the same atomic number, but different mass number.&nbsp;

The Atom

The atom represents the basic functional unit in chemistry

Mole Concept

The Mole Concept involves the interconversions between different unit amounts of a substance.

Periodic Table: Representative Elements & Transition Metals

The Groups of the Periodic Table can be broken down into the Representative Elements and Transition Metals

Atomic Theory

John Dalton, one of the "Fathers of Chemistry"is credited with modernizing the Atomic Theory.

Subatomic Particles

The atom is composed of 3 subatomic particles:neutrons, protons, and electrons.

Periodic Table: Elemental Forms

The elements of the Periodic Table exist in different elemental forms in the natural world

Periodic Table: Phases

Under standard conditions of temperature and pressure, the elements can exist as solids, liquids or gases

Atomic Mass

The atomic mass of an element includes the masses of all 3 subatomic particles of neutrons, protons and electrons.&nbsp;

Periodic Table: Group Names

The Periodic Table can be further classified into Periods and Groups.&nbsp;

"In a chemical reaction, no matter is created or destroyed, but instead changes form."

Calculating Molar Mass

Molar Mass is a physical property that represents the mass of a substance divided by the amount of that substance.

Rutherford Gold Foil Experiment

The Gold Foil Experiment helped with the discovery of the positively charged nucleus.

Law of Multiple Proportions

“When 2 elements (A &amp; B) form different compounds, the mass of Element B that combine with 1 g of A are a ratio of whole numbers."

Periodic Table: Element Symbols

The Element Symbols of the Periodic Table represent the abbreviated form of an element