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4 years ago

The energy needed to create bonds between two hydrogen molecules is measured in units called __________

Chemistry

1 answer:

igomit [66]4 years ago

5 0

This is called bond energy, or bond enthalpy, and is measured in units of kilojoules per mole (kJ/mol).

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Which statement is true regarding the circuit schematic below?

LenKa [72]

Unless you're able to provide a diagram representing the problem, there's not much I can do so solve this problem.

4 0

4 years ago

Electrons are important in chemical reactions. Since the elements in a family tend to behave similarly in chemical reactions, on

aleksklad [387]

Answer:

One may conclude that they have an identical number of electrons in their outermost shell, therefore the can be substituted for one another.

Explanation:

Elements in the same family tend to behave similarly in chemical reactions because they have similar number of valence electrons in their outermost shell and they also have similar chemical properties.

Valence electrons are responsible for reactions between elements. The valence electron makes it possible for atoms to combine and react, therefore, elements in a family behave similarly in chemical reactions because they have an identical number of electrons in their outermost shell.

7 0

3 years ago

PLEASE HELP! mass number - atomic number =

Dmitry [639]

Answer:

Number of neutrons

Explanation:

The mass number represents the number of protons and neutrons combined and the atomic number only represents the number of protons.

mass number - atomic number = number of neutrons

7 0

3 years ago

Read 2 more answers

TNT is manufactured by the reaction of toluene with nitric acid according to the following equation: C7H8 (l) + 3 HNO3 (aq) ---&

den301095 [7]

Answer:

170. g C₇H₅(NO₂)₃

General Formulas and Concepts:

Chemistry - Stoichiometry

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

RxN: C₇H₈ (l) + 3HNO₃ (aq) → C₇H₅(NO₂)₃ (s) + 3H₂O (l)

Given: 69.0 g C₇H₈ (Toluene)

Step 2: Identify Conversions

Molar Mass of C - 12.01 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of C₇H₈ - 7(12.01) + 8(1.01) = 92.15 g/mol

Molar Mass of C₇H₅(NO₂)₃ - 7(12.01) + 5(1.01) + 3(14.01) + 6(16.00) = 227.15 g/mol

Step 3: Stoichiometry

$69.0 \ g \ C_7H_8(\frac{1 \ mol \ C_7H_8}{92.15 \ g \ C_7H_8} )(\frac{1 \ mol \ C_7H_5(NO_2)_3}{1 \ mol \ C_7H_8} )(\frac{227.15 \ g \ C_7H_5(NO_2)_3}{1 \ mol \ C_7H_5(NO_2)_3} )$ = 170.085 g C₇H₅(NO₂)₃

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

170.085 g C₇H₅(NO₂)₃ ≈ 170. g C₇H₅(NO₂)₃

3 0

3 years ago

In many halocarbons, among them chloroethane (CH3CH2Cl), a halogen is attached to an aliphatic carbon chain. These halocarbons a

Marina CMI [18]

The answer is 1. Carboxylic acids

8 0

3 years ago