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Pachacha [2.7K]
2 years ago
15

How is half-life most likely used with respect to this fossil?

Chemistry
1 answer:
Scorpion4ik [409]2 years ago
5 0
The half life of a certain substance is being used to date fossils or to know their age. Most likely, it is carbon-14 that is the substance that is being traced in fossils since it is what remains after million of years in a fossil. The half life is important in determining the constant in the decay and, consequently, determining the age of the fossil.
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If 7.4 moles of carbon dioxide is produced in this reaction, how many moles of oxygen gas would be needed?
Nimfa-mama [501]

Answer:

11.6 mol O₂

Explanation:

  • C₇H₁₆ + 11 O₂ → 7 CO₂ + 8 H₂O

In order to solve this problem we need to <u>convert moles of carbon dioxide (CO₂) into moles of oxygen gas (O₂)</u>. To do so we'll use a conversion factor containing the <em>stoichiometric coefficients</em> of the balanced reaction:

  • 7.4 mol CO₂ * \frac{11molO_2}{7molCO_2} = 11.6 mol O₂
4 0
2 years ago
Which college classes would a student most likely take to become an oceanographer? Select 4 choices.
Setler [38]

Answer:

marine biology

coastal ecology

astronomy

meteorology

Explanation:

As a college student, to study oceanography one will have to take classes in the field of marine biology, coastal ecology, astronomy and meteorology.

An oceanographer is someone or a professional that studies the ocean in order have more scientific knowledge about them.

Oceanography is a merger of geology, biology, chemistry, physics as it pertains to the ocean.

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  • Marine biology and coastal ecology deals with study of life forms in their marine environment.
  • Astronomy and meteorology helps to gain insight about the formation of the ocean and how weather relates to the ocean.
5 0
3 years ago
when you decrease the distance between two magnets that are repelling, you increase the magnetic force. True or false?
kupik [55]

Answer:

False that would be crazy but cool

3 0
3 years ago
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How do plants and animals help to maintain a balance of carbon dioxide in the atmosphere
Tom [10]
Well all I know that animals take in oxygen and take out carbon dioxide and plants take in carbon dioxide and take out oxygen
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2 years ago
Which of the following correctly describes a compound?
Oksi-84 [34.3K]
I think its c, it makes sense to me to be c
7 0
3 years ago
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