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tatyana61 [14]
3 years ago
5

Designed to be a measure of the amount of energy released by an earthquake

Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
5 0
The answer is the moment magnitude scale
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Given the chemical equation: 2 Pb + O2 → 2 PbO, if 51.8 grams of Pb are formed in this reaction, then 8.00 grams of O2 must have
Nutka1998 [239]

Answer:

If 51.8 of Pb is reacting, it will require 4.00 g of O2

If 51.8 g of PbO is formed, it will require 3.47 g of O2.

Explanation:

Equation of the reaction:

2 Pb + O2 → 2 PbO

From the equation of reaction, 2 moles of lead metal, Pb, reacts with 1 mole of oxygen gas, O2, to produce 2 moles of lead (ii) oxide, PbO

Molar mass of Pb = 207 g

Molar mass of O2 = 32 g

Molar mass of PbO = 207 + 32 = 239 g

Therefore 2 × 207 g of Pb reacts with 32 g of O2 to produce 2 × 239 g of PbO

= 414 g of Pb reacts with 32 g of O2 to produce 478 g of PbO

Therefore, formation of 51.8 g of PbO will require (32/478) × 51.8 of O2 = 3.47 g of O2.

If 51.8 of Pb is reacting, it will require (32/414) × 51.8 g of O2 = 4.00 g of O2

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3 years ago
Uranium – 235 has a half-life of 713 million years. Would uranium – 235 or carbon – 14 be more useful for dating Cambrian time e
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What are three ways lakes can form?
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Just choose 3

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It didn't have science but the subject is science. A climate with short cool summers and long, bitterly cold winters is the
kvasek [131]
Hey there,

Question : <span>A climate with short cool summers and long, bitterly cold winters is the?

Answer : D, Tundra Climate

Hope this helps :))

<em>~Top♥</em>
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6 0
3 years ago
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