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Advocard [28]
2 years ago
7

I need answers plzbtw D says ice crystals ​

Chemistry
1 answer:
tangare [24]2 years ago
7 0

Answer:

B. Hydrogen and oxygen molecules

General Formulas and Concepts:

<u>Chemistry - Reactions</u>

  • Reactants are always on the left side of the arrow
  • Products are always on the right side of the arrow

Explanation:

<u>Step 1: Define</u>

Reaction RxN:   2H₂ + O₂ → 2H₂O

<u>Step 2: Identify</u>

Reactants:   H₂ and O₂

Products: H₂O

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The following information is to be used for the next 2 questions. In order to analyze for Mg and Ca, a 24-hour urine sample was
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Explanation:

From the given information:

The concentration of metal ions are:

[Ca^{2+}]= \dfrac{0.003474 \ M \times 20.49 \ mL}{10.0 \ mL}

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[Mg^2+] = \dfrac{0.003474 \ M\times (26.23  - 20.49 )mL}{10.0 \ mL}

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3 years ago
If you were to travel from the surface to the center of Earth, the temperature would
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In a lab experiment 80.0 g of ammonia [NH3] and 120 g of oxygen are placed in a reaction vessel. At the end of the reaction 72.2
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The percent yield of the reaction : 89.14%

<h3>Further explanation</h3>

Reaction of Ammonia and Oxygen in a lab :

<em>4 NH₃ (g) + 5 O₂ (g) ⇒ 4 NO(g)+ 6 H₂O(g)</em>

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mol NH₃ (MW=17 g/mol):

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mol of H₂O based on O₂ as limiting reactants :

mol H₂O :

\tt \dfrac{6}{5}\times 3.75=4.5

mass H₂O :

4.5 x 18 g/mol = 81 g

The percent yield :

\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{72.2}{81}\times 100\%=89.14\%

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