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Dvinal [7]
2 years ago
11

Why do scientists think the Grand Canyon was once covered by an ocean? (1 point)

Chemistry
1 answer:
PIT_PIT [208]2 years ago
4 0

Seawater found to be seeping up through the canyon floor is why

scientists think Grand Canyon was once covered by an ocean.

Grand cayon is located in Arizona, United States and comprises of a lot of

fossil records and rocks which makes it one of the best sites for geological

study.

The Grand cayon was found to be seeping through its floor which made

scientists think it was once covered by an ocean years ago.

Read more about Grand cayon on brainly.com/question/20629780

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Calculate the concentration imports per million ppm of DDT if a sample size of 5000 g contained 0.10 g DDT
nevsk [136]

Answer:

20ppm

Explanation:

parts per million are defined as the mass of solute in mg (In this case, mass of DDT) per kg of sample.

To solve this question we must find the mass of DDT in mg and the mass of sample in kg:

<em>Mass DDT:</em>

0.10g * (1000mg / 1g) = 100mg

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5000g * (1kg / 1000g) = 5kg

Parts per Million:

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<h3>20ppm</h3>
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