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3 years ago

9

What can the rock layers tell us about life on Earth?

1 answer:

Paraphin [41]3 years ago

3 0

Explanation:

The location of fossils in rock layers provides evidence of Earth's past landscapes. ... Scientists use a technique called radiocarbon dating to find out the age of the fossils. Once they know the age of the fossil in the rock, they also know that rock itself is about the same age!

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What is the Celsius equivalent of 212°f

larisa86 [58]

212 degrees Fahrenheit is equivalent to 100 degrees Celsius.

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4 years ago

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A sodium ion has a positive charge because it has

Assoli18 [71]

Because it has more protons than electrons. Protons are positive so if there is more of them than electrons, the ion will have a positive charge.

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3 years ago

A process stream contains 450 mol/s benzene and 375 mol/s toluene. Calculate the mole fraction of benzene in the process stream.

Tema [17]

Answer:

0.5455

Explanation:

The moles of benzene in the process stream in 1 sec = 450 moles

The moles of toluene in the process stream in 1 sec = 375 moles

So, according to definition of mole fraction:

$Mole\ fraction\ of\ benzene=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

Applying values as:

$Mole\ fraction\ of\ benzene=\frac {450}{450+375}$

<u>Mole fraction of benzene in the process stream = 0.5455</u>

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4 years ago

If the latitude is high does it mean it’s is hot or cold PLEASE HELP

yanalaym [24]

Answer:

cold

Explanation:

cold is when it get high on lattitude

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3 years ago

How many grams of aluminum are required to produce 8.70 moles of aluminum chloride

Serggg [28]

Answer:

1160.058g

Explanation:

8.70*133.34=1160.058g

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3 years ago