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3 years ago

Atoms tendency is to become stable what does this mean

2 answers:

5 0

An atom would be stable if it had 8 valence electrons. This means that they would be considered happy and have a full octet, making them not reactive.

andre [41]3 years ago

4 0

This means they have 8 valence electrons , they are stable and need no more

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1. In order to make 1 salad it requires 1 head of lettuce, two tomatoes and three carrots. What would be the coefficients for th

pogonyaev

Answer:

3 salad = 3 lettuce + 6 tomatoes + 9 three carrots

Coefficients: 3, 6, 9

Explanation:

1 salad = 1 lettuce + 2 tomatoes + 3 three carrots

<em>Multiply all the coefficients of 1 salad by 3:</em>

3(1 salad) = 3(1 lettuce + 2 tomatoes + 3 three carrots)

<em>Expand the equation:</em>

3 salad = 3 lettuce + 6 tomatoes + 9 three carrots

5 0

3 years ago

Identify this symbol.<br> Cl-

g100num [7]

Symbols on the periodic table represent an element.

Cl is also known as chlorine.

8 0

3 years ago

How many molecules are in 0.55 moles of Cu(NO3)2?

xeze [42]

<h3>Answer:</h3>

3.3 × 10²³ molecules Cu(NO₃)₂

<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>

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

0.55 mol Cu(NO₃)₂

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

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 0.55 \ mol \ Cu(NO_3)_2(\frac{6.022 \cdot 10^{23} \ molecules \ Cu(NO_3)_2}{1 \ mol \ Cu(NO_3)_2})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 3.3121 \cdot 10^{23} \ molecules \ Cu(NO_3)_2$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

3.3121 × 10²³ molecules Cu(NO₃)₂ ≈ 3.3 × 10²³ molecules Cu(NO₃)₂

4 0

3 years ago

Burning biofuels releases co2 into the atmosphere, contributing to global warming. however, this is at least partially offset by

castortr0y [4]

Photosynthesis in green plants during which CO2 is absorbed to form glucose

3 0

3 years ago

What are atoms made of?

mr Goodwill [35]

Answer:

Explanation:

Atoms are made of 3 parts.

Protons
Electrons
Neutrons

- The protons and Neutrons form together creating a sun, or nucleus at the center

- The electrons orbit this sun like planets.

The element with Th is Thorium. It is a metallic chemical element that when exposed to air, hardens.

7 0

3 years ago