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Gala2k [10]
3 years ago
12

HELP ASAP PLEASE!!!! 15 PTS!!

Chemistry
2 answers:
Bond [772]3 years ago
5 0
ADD THEM all, and then divide by four. Thats what I would do! 
marshall27 [118]3 years ago
5 0

the correct answer is 2,3,4,6, and 7

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Answer:

B.

Explanation:

electrons can be lost by one particle, and gained by another particle

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The energy required to remove an electron from a neutral atom is known as its:
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How many moles of Al would be produced from 20 moles of Al2O3?<br> 2Al2O3<br> -&gt;<br> 4A1 + 302
Evgesh-ka [11]
<h3>Answer:</h3>

\displaystyle 40 \ mol \ Al

<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>Stoichiometry</u>

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<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Balanced] 2Al₂O₃ → 4Al + 3O₂

[Given] 20 mol Al₂O₃

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

[RxN] 2 mol Al₂O₃ → 4 mol Al

<u>Step 3: Stoich</u>

  1. [DA] Set up:                                                                                                     \displaystyle 20 \ mol \ Al_2O_3(\frac{4 \ mol \ Al}{2 \ mol \ Al_2O_3})
  2. [DA] Multiply/Divide [Cancel out units]:                                                         \displaystyle 40 \ mol \ Al

<u>Step 4:Check</u>

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

Since our final answer already has 1 sig fig, there is no need to round.

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Balanced chemical equation for the standard formation reaction of solid sodium carbonate
kenny6666 [7]
CO2 + 2 NaOH → Na2CO3 + H2O
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2 years ago
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