1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OleMash [197]
3 years ago
15

What makes scientists think that arctic areas were once warm?

Chemistry
1 answer:
kogti [31]3 years ago
3 0

Answer:well the ice preserves the wooly mammoths

Explanation:its not just snow its bacteria witch means that once living to frozen thats how they know how it looks like and to see what animal its related to now day it related to the elephants

You might be interested in
Which type of radiation has the highest penetrating ability?
Ulleksa [173]
Gamma rays and x- rays have the highest penetrating power
8 0
3 years ago
Read 2 more answers
12. A voltaic cell consists of a chromium electrode dipped in a 1.20 M chromium (III) nitrate
Lilit [14]

For a voltaic cell consisting of chromium, an electrode dipped in a 1.20 M chromium (III) nitrate solution and a tin electrode dipped in a 0.400 M tin (II) nitrate solution, the cell potential at 298 K  is mathematically given as

Ecell = 0.577 V

<h3 /><h3>What is the cell potential at 298 K?</h3>

Generally, the equation for the Oxidation and Reduction  is mathematically given as

Cr(s) ------------------ Cr+3(aq) + 3e- ] x 2 ...O

Sn+2(aq) + 2e- ------------ Sn(s) ] x 3  ...R

Reaction

 2 Cr(s) + 3 Sn+2(aq) --------------- 2 Cr+3(aq) + 3 Sn(s)

Therefore

Eicell = - 0.14 - ( - 0.74)

Eicell = 0.60

In conclusion

Ecell= E0cell - \frac{0.0591}{n} * \frac{log[Cr+3]^2}{ [ Sn+2]^3}

Ecell = 0.60 - \frac{0.0591 }{6} \frac{log( 1.20)^2}{ ( 0.200)^3}

Ecell = 0.577 V

Read more about Temperature

brainly.com/question/13439286

5 0
2 years ago
What property can be used to determine if a sample is a pure substance or a mixture?
Yuliya22 [10]

Answer:

Melting point

Explanation:

Pure substances have sharp melting and boiling points while impurities lower the melting point and raise the boiling point

7 0
2 years ago
Mars is known as the ____ planet.<br><br> A) Blue<br> B) Gaseous<br> C) Red<br> D) Sandy
Leni [432]

Answer:

Of course it's C

Red planet

Explanation:

It is because the soil on Mars is rich of Fe (Iron).

That makes the soil look red.

Even on our planet we have such this places like hormuz island in Iran.

5 0
3 years ago
Which regions on the periodic table can adopt positive and negative oxidation numbers?
Dennis_Churaev [7]

<span>The region(s) of the periodic table which are made up of elements that can adopt both positive and negative oxidation numbers are the “non-metal” region. As we can see on the periodic table, the elements situated at the right side of the table have two oxidation states, one positive and the other a negative. </span>

7 0
3 years ago
Other questions:
  • If a chemical reaction catalyzed by an enzyme is being carried out, and there is a sudden, drastic decrease in temperature, what
    8·2 answers
  • An 85 kg construction worker has 37 485 J of gravitational potential energy. To the nearest whole number, the worker is___
    9·1 answer
  • What are the components of black powder? What are the ratios of these components?
    9·1 answer
  • What do you call anything that has mass and volume?
    14·2 answers
  • Which law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pr
    7·1 answer
  • How many moles of gold are Cleveland to 1.204×1024 atoms
    9·1 answer
  • This chemical equation represents a chemical reaction. 2HNO3+Na2SO3-2NaNO3+H2O+SO2
    8·2 answers
  • An atom has 24 protons, 22 electrons, and 28 neutrons. What is the IONIC CHARGE of the atom? *
    15·1 answer
  • When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy change is ta
    7·1 answer
  • Please do for 30 points its due today. <br><br> ( if you waste my points i will report.)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!