Answer:
3.98 g
Explanation:
Step 1. Write the balanced chemical reaction. In this case, magnesium reacts with oxygen to produce magnesium oxide:
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Step 2. Calculate the number of moles of magnesium:
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Step 3. Calculate the number of moles of oxygen:
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Step 4. Identify the limiting reactant comparing the equivalents. Equivalent of Mg:
Equivalent of oxygen:
Therefore, Mg is the limiting reactant.
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Step 5. According to the stoichiometry of this reaction:
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Step 6. Convert the number of moles of MgO into mass:
The given reaction is incomplete. The complete reaction is as follows.
Ammonium phosphate is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid with liquid ammonia. Calculate the moles of phosphoric acid needed to produce 1.30 mol of ammonium phosphate. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
Explanation:
Chemical equation for the given reaction is as follows.
Therefore, moles of required will be calculated as follows.
= 1.30 mol
Therefore, we can conclude that the moles of phosphoric acid needed to produce 1.30 mol of ammonium phosphate are also 1.30 mol.
The symbol for dinitrogen trisulfide is N2S3
In ridge push, the mantle wells upward because of the
convection and elevates the edges of spreading oceanic plates. Because these
plates are higher at the spreading center, they are forced downhill due to
<em>gravity</em> and eventually flatten out to the ocean floor.
<h3>
Answer:</h3>
0.000104 mol
<h3>
General Formulas and Concepts:</h3>
<u>Math</u>
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<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>
6.27 × 10¹⁹ atoms
<u>Step 2: Identify Conversions</u>
Avogadro's Number
<u>Step 3: Convert</u>
- Set up:
- Multiply/Divide:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
Since our final answer already has 3 sig figs, there is no need to round.