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zalisa [80]
3 years ago
14

Pleaseeeeeeeeeeeeeeeeee hurryyyyyyyyyyyyyyy

Biology
1 answer:
castortr0y [4]3 years ago
7 0

<span>1) Which of the following is a possible formula unit? PbO -  Li2B  - Al2Pb3 -  ClO
The correct answer is PbO which is Lead(II) oxide – also known as Lead Monoxide – which is an inorganic compound. It is an Amphoteric oxide which can be found, in modern use, in industrial glass, ceramics, or computer components, due to its crystal structure. </span>

<span>
</span>

<span>2) What is the formula of a compound formed between iodine (I) and calcium (Ca)?
Calcium will always give two electrons. but iodine can receive only one. Therefore two atoms of iodine react with one atom of calcium to give CaI2. Their bond is an ionic bond.
Ca 2+ + 2I 1- --> CaI2</span>

<span>
</span>

<span>3) What is the resulting formula unit when strontium (Sr) and phosphorus (P) bond?
Strontium (Sr) wants to lose two (2) electrons, and phosphorus (P) wants to gain three (3). By using the criss-cross method, if you flip the 2 and 3 to the opposite elements, you will end up with the formula Sr3P2.</span>

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Asteroid impact

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Explanation:

Asteroid impact and volcanic eruptions are two common events that could lead to a mass extinction.

A mass extinction is an abrupt decrease in life on earth due some catastrophic event.

  • The collision of a large bolide on the surface of the earth is a catastrophe in itself.
  • The collision and its aftermath have destructive consequences on life.
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  • Volcanic eruptions can become global phenomenon that upsets the earth balance.

Learn more:

Extinction brainly.com/question/10860460

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8 0
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I’m guessing . . .
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Answer:

there is no image attachment. if u add one, i can help!

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Explanation:

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3 0
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Navah writes out the chemical equation for photosynthesis. She includes two reacting molecules to the left of the arrow and two
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Components of photosynthesis:
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Light energy, mostly from sunlight, is the main requirement for photosynthesis to occur. 


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