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lawyer [7]
3 years ago
5

According to the american academy of pediatric dentistry, you should make sure your toothpaste has

Chemistry
2 answers:
bezimeni [28]3 years ago
8 0
A.fluoride

Fluoride helps to prevent tooth decay
aleksandr82 [10.1K]3 years ago
7 0

Answer: Fluoride

Explanation:

Fluoride is helpful in preventing the decay of tooth. It has been added in the water supplies for the lasts 70 years to keep the tooth and body healthy.

Now it has added to toothpaste in order to strengthen the enamel, hard surface of the tooth and oral hygiene.

It is a type of mineral which is necessary for the good health of teeth.It is a natural cavity fighter.

hence, the correct answer is fluoride.

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How many atoms of cobalt are in 4 moles of cobalt?
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<h3>Answer:</h3>

2 × 10²⁴ atoms Co

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

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • 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>

4 mol Co (Cobalt)

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

Avogadro's Number

<u>Step 3: Convert</u>

  1. Set up:                               \displaystyle 4 \ mol \ Co(\frac{6.022 \cdot 10^{23} \ atoms \ Co}{1 \ mol \ Co})
  2. Multiply/Divide:                 \displaystyle 2.4088 \cdot 10^{24} \ atoms \ Co

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 1 sig fig.</em>

2.4088 × 10²⁴ atoms Co ≈ 2 × 10²⁴ atoms Co

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2 years ago
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