2 years ago

How did scientists discover that Earth's outer core is liquid?

1 answer:

3 0

They discovered this since S waves don’t travel through the earth but P waves do. P waves tend to travel faster than S waves in speed, 1&14km/s vs 1&8km/s

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Please help urgent Balance the following word equation:

LekaFEV [45]

Answer:

AlCl3 + 3Na > Al + 3NaCl

Explanation:

AlCl3+Na → Al + NaCl

Al =1 Al=1

Cl =3 Cl = 1

Na=1. Na = 1

so balance

and it would be

Alcl3 + 3Na → Al + 3NaCl

8 0

2 years ago

6 Which element requires the least amount of

DaniilM [7]

Which element requires the least amount of

energy to remove the most loosely held electron

from a gaseous atom in the ground state?

<h3>Answer-</h3><h3>Na</h3>

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2 years ago

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What is the overall cell potential for this redox reaction? Ca2+ + 2Li = Ca + 2Li+ Ca2+ + 2e- = Ca -2.87 V Li = Li+ + e- -3.05 V

Jet001 [13]

The redox reaction is

$Ca^{+2} + 2Li(s) = Ca(s) + 2Li^{+}$

Here

Calcium undergoes reduction, and acts as cathode

Lithium undergoes oxidation and acts as anode

The reduction potential of calcium is -2.87 V

The reduction potential of lithium is - -3.05 V

We know that

Ecell = Ecathode - Eanode

Ecell = -2.87 - (-3.05) = 0.18 V

4 0

3 years ago

Atoms of which two elements have combined total of 23 protons

vichka [17]

Answer:

sodium and magnesium

Explanation:

4 0

3 years ago

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Which of the following would not be considered matter?<br><br> plants<br> cheese<br> light<br> blood

belka [17]

Answer:

Light

Explanation:

Plant is a thing so it has matter

Cheese is food so it has matter

Blood is a liquid so it has matter

3 0

3 years ago