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lisabon 2012 [21]
3 years ago
8

match the following items......(1. used in engines and rockets souring 2. a type of slow combustion respiration 3. a chemical ch

ange rapid combustion 4. electron loss when combining with another element photosynthesis 5. element in bone which absorbs X-rays calcium 6. reaction in which the product is glucose oxidation
Chemistry
2 answers:
Anna11 [10]3 years ago
8 0

Answer:

Match the following items.

Match the following items.

1. used in engines and rockets  

6

photosynthesis  

2. a type of slow combustion  

4

oxidation  

3. a chemical change  

2

respiration  

4. electron loss when combining with another element  

1

rapid combustion  

5. element in bone which absorbs X-rays  

3

souring  

6. reaction in which the product is glucose  

5

calcium

Explanation:

mezya [45]3 years ago
7 0
1. Rapid combustion - <span>used in engines and rockets souring. Large amount of energy produced.
</span>2. R<span>espiration - </span><span>a type of slow combustion. Organic matter is transfered into energy and carbon dioxide.
3. Soaring - a chemical change. A</span>cidification of milk into soured milk.<span>
4. Oxidation - electron loss when combining with another element. Metals gave electrons to nonmetals and became cations.
5. C</span>alcium - element in bone which absorbs X-rays. Calcium increases the photoelectric effect<span> which increase absorption of X-rays.
6. P</span>hotosynthesis reaction in which the product is glucose. Plants produce glucose from carbon dioxide and water.
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<em>The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th-century chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. </em>

<em>In the first step, aluminum hydroxide reacts to form alumina (Al₂O₃) and water: 2 Al(OH)₃(s) → Al₂O₃(s) + 3H₂O(g). In the second step, alumina (Al₂O₃ and carbon react to form aluminum and carbon dioxide: 2Al₂O₃(s)+3C(s)→4Al(s)+3CO₂(g). Suppose the yield of the first step is 63% and the yield of the second step is 89%. </em>

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Let's consider the 2 steps in the synthesis of Al.

Step 1: 2 Al(OH)₃(s) → Al₂O₃(s) + 3 H₂O(g)

Step 2: 2 Al₂O₃(s) + 3 C(s) → 4 Al(s) + 3 CO₂(g)

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2.0 kg (R) × (100 kg (T) / 89 kg (R)) = 2.2 kg = 2.2 × 10³ g

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2.2 × 10³ g Al × (203.92g Al₂O₃ / 107.9 g Al) = 4.2 × 10³ g Al₂O₃

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