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3 years ago

A reaction in which energy is absorbed

Chemistry

2 answers:

Alekssandra [29.7K]3 years ago

8 0

When chemical bonds are broken from the environment in which they were made

Alchen [17]3 years ago

7 0

Hope this helped you :)

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Which scenario would adhere to the law of conservation of energy?

Nina [5.8K]

Examples of scenarios that would adhere to the law of conservation of energy are as follows:

In a loudspeaker, electrical energy is converted into sound energy.
In a microphone, sound energy is converted into electrical energy.
In a generator, mechanical energy is converted into electrical energy

<h3>What is law is conservation of energy?</h3>

The law of conservation of energy states that energy cannot be created nor destroyed but is conserved when it is transferred from one form to another.

The law of conservation of energy is obeyed by majority of natural and artificial systems. For example;

In a loudspeaker, electrical energy is converted into sound energy.
In a microphone, sound energy is converted into electrical energy.
In a generator, mechanical energy is converted into electrical energy

Learn more about law of conservation of energy at: brainly.com/question/20971995

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2 years ago

In the reaction 2H2(g) + O2(g) ® 2H2O(g), the volume ratio of H2 to H2O is __________.

Nadusha1986 [10]

2:2 is the answer to your question

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4 years ago

What are the three challenges of a cell?

Zolol [24]

<span>The cell must exchange materials with the environment across the surface membrane. An increase in size will result in a relatively greater increase in volume and mass than in surface area, so that the cell will lose effective exchange capacity.

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3 years ago

How many grams of silver chloride can be produced by reacting excess silver nitrate with 2.4 moles of zinc chloride? _____AgNO3

worty [1.4K]

<h3>Answer:</h3>

690 g AgCl

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Writing Compounds

<u>Stoichiometry</u>

Using Dimensional Analysis
Limiting Reactant/Excess Reactant

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Unbalanced] AgNO₃ + ZnCl₂ → AgCl + Zn(NO₃)₂

↓

[RxN - Balanced] 2AgNO₃ + ZnCl₂ → 2AgCl + Zn(NO₃)₂

[Given] 2.4 mol ZnCl₂

[Solve] <em>x</em> g AgCl

<u>Step 2: Identify Conversions</u>

[RxN] 1 mol ZnCl₂ → 2 mol AgCl

[PT] Molar Mass of Ag - 107.87 g/mol

[PT] Molar Mass of Cl - 35.45 g/mol

Molar Mass of AgCl - 107.87 + 35.45 = 143.32 g/mol

<u>Step 3: Stoich</u>

[DA] Set up: $\displaystyle 2.4 \ mol \ ZnCl_2(\frac{2 \ mol \ AgCl}{1 \ mol \ ZnCl_2})(\frac{143.32 \ g \ AgCl}{1 \ mol \ AgCl})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 687.936 \ g \ AgCl$