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kow [346]
3 years ago
15

What was the primary cause of the increase in oxygen content between 400 and 300 million years ago

Chemistry
1 answer:
Gelneren [198K]3 years ago
4 0

Answer:

What was the primary cause of the increase in oxygen content between 400 and 300 million years ago

Explanation:

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How can you tell that a white powder is salt without tasting it?
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You can detect salt in water without tasting by measuring the density of the water. Place a glass of spring water and a glass of the suspected salt water on a balance scale and the heavier one contains salt. Other ways to test for salt in water is to put a drop of water on the end of a nail and place in a gas flame. If the water contains salt, the flame will turn a yellow/orange color.

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Which is an example of chemical weathering?
kobusy [5.1K]

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b. the layer of oxide formed on statues made of metal

Explanation:

Chemical weathering is a process whereby rocks are disintegrated or weathered causing a chemical reaction thereby leading to change in the parent rock constituents .

In chemical weathering a new substance is usually formed after the weathering takes place.

From the question the layer of statue made by metal will likely form oxides of those metals. Example Silver will react with oxygen to form an entirely new substance like silver(i)oxide.

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3 years ago
Which of the following has to remain constant to allow you to use the combined gas law for calculations?
Mazyrski [523]

Answer:

Amount of gas

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4 0
3 years ago
What kinda of water movement helps the fishing industry
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Answer:

Upwelling is the natural process which brings cold, nutrient-rich water to the surface. A huge upwelling regularly occurs off the coast of Peru, which enjoys a large fishing industry as a result. Upwelling is a process in which currents bring deep, cold water to the surface of the ocean.

Explanation:

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5 0
3 years ago
Draw the orbital notation for the element Boron
Wewaii [24]

Answer:

I can't draw but you could draw 2 electrons in the first orbit and 3 electrons in the second orbit.

Explanation:

6 0
2 years ago
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