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3 years ago

What are the primary elements of the earths layres?

Chemistry

1 answer:

Vaselesa [24]3 years ago

4 0

The 4 main one are Iron, oxygen, silicon, and magnesium<span />

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Light bending as it passes through a rain drop is an example of Transmission Diffraction Refraction Reflection

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The answer would be the third one listed, Refraction

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3 years ago

What is the electronegativity difference between oxygen and fluorine? What type of bond is this?

JulijaS [17]

Answer:

Veja, por exemplo, que os elementos mais eletronegativos são os que estão no canto superior direito da tabela, isto é, o flúor (4,0) e o oxigênio (3,5), e os menos eletronegativos são os que estão no canto inferior esquerdo, que são o frâncio (0,8) e o césio (0,8).

Explanation:

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3 years ago

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aksik [14]

Answer:

either a car or a rock

Explanation:

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3 years ago

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What will happen when these mutations can no longer be killed by<br> antibiotics?

Alja [10]

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3 years ago

What is the mass in grams of 2.25 mol of the element iron, Fe?

scZoUnD [109]

<h3>Answer:</h3>

126 g Fe

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

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

2.25 mol Fe

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

Molar Mass of Fe - 55.85 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 2.25 \ mol \ Fe(\frac{55.85 \ g \ Fe}{1 \ mol \ Fe})$
Multiply: $\displaystyle 125.663 \ g \ Fe$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

125.663 g Fe ≈ 126 g Fe

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3 years ago