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Whitepunk [10]
3 years ago
10

Which of these is used to find the estimated age range of a fossil?

Chemistry
2 answers:
Maksim231197 [3]3 years ago
8 0

Answer:

Carbon-14

Explanation:

I don't know how to explain

BigorU [14]3 years ago
8 0

Answer:

Index fossils

Explanation:

Index fossils are the remains of living organisms for which we have already established relative age. These are fossils that only existed during a limited period of geologic time and are easily identified, found in large volumes, and found in many different locations around Earth. Due to these factors, index fossils may be used as a guide for comparison in determining the relative age of an unknown object.

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What is the change in internal energy ( ΔU ) of the system if q = –8 kJ and w = –1 kJ for a certain process?
Radda [10]

Answer:

Change in internal energy (ΔU) = -9 KJ

Explanation:

Given:

q = –8 kJ [Heat removed]

w = –1 kJ [Work done]

Find:

Change in internal energy (ΔU)

Computation:

Change in internal energy (ΔU) = q + w

Change in internal energy (ΔU) = -8 KJ + (-1 KJ)

Change in internal energy (ΔU) = -8 KJ - 1 KJ

Change in internal energy (ΔU) = -9 KJ

6 0
3 years ago
Help in chem please!!!!!!
IgorLugansk [536]

This is a one-step unit analysis problem.  Since we are staying in moles, grams of our compound, and thus molar mass, is not needed.

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<h3>Answer:</h3>

2.49 mol

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3 0
3 years ago
The compound NacI is an example of a/an
maria [59]
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Explanation:

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