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IgorC [24]
3 years ago
10

Dude pls help

Chemistry
1 answer:
Anestetic [448]3 years ago
7 0

Answer:

KO is the limiting reactant.

0.11 mol O₂ will be produced.

Explanation:

4 KO₂  +  2 H₂O  ⇒  4 KOH  +  3 O₂

Find the limiting reagent by dividing the moles of the reactant by the coefficient in the equation.

(0.15 mol KO₂)/4 = 0.0375

(0.10 mol H₂O)/2 = 0.05

KO₂ is the limiting reagent.

The amount of product produced depends on the limiting reagent.  To find how much is produced, take moles of limiting reagent and multiply it by the ratio of reagent to product.  You can find the ratio by looking at the equation.  For every 4 moles of KO₂, 3 moles of O₂ are produced.

0.15 mol KO₂  (3 mol O₂)/(4 mol KO₂) = 0.1125 mol O₂

0.11 mol O are produced.

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2Mg + O2 → 2MgO<br><br> If you are burning 5.8332 g of Mg, how many grams of MgO will this make?
LekaFEV [45]
<h3>Answer:</h3>

9.6724 g MgO

<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>Chemistry</u>

<u>Stoichiometry</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Balanced] 2Mg + O₂ → 2MgO

[Given] 5.8332 g Mg

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

[RxN] 2 mol Mg = 2 mol MgO

Molar Mass of Mg - 24.31 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of MgO - 24.31 + 16.00 = 40.31 g/mol

<u>Step 3: Stoichiometry</u>

  1. Set up:                              \displaystyle 5.8332 \ g \ Mg(\frac{1 \ mol \ Mg}{24.31 \ g \ Mg})(\frac{2 \ mol \ MgO}{2 \ mol \ Mg})(\frac{40.31 \ g \ MgO}{1 \ mol \ MgO})
  2. Multiply/Divide:                                                                                               \displaystyle 9.67241 \ g \ MgO

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 5 sig figs.</em>

9.67241 g MgO ≈ 9.6724 g MgO

5 0
3 years ago
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kipiarov [429]

Density does not change with the amount of matter.

The density of water is 1 g/mL whether you have 1 mL or 1000 mL of water. Density is an i<em>ntensive </em>property.

Mass, volume, and weight change with the quantity of matter. For example, the mass of 1000 mL of water is greater than the mass of 1 mL of water. Mass, volume, and weight are <em>extensiv</em>e properties.


5 0
3 years ago
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