1 year ago

How old was this tree when it was cut down?

Chemistry

1 answer:

son4ous [18]1 year ago

5 0

Do you have more information than this
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The atomic number of carbon is 6. its nucleus must contain:

Aloiza [94]

Must contain: 6 protons, 6 electrons and 12 neutrons.

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2 years ago

Calculate the ph of sweater which has a hydrogen ion concentration of 1 times 10 to the power of 8

telo118 [61]

Answer:

The pH of the sweater containing Hydrogen ion concentration

$[H^{+}]=1\times 10^{-8}$ is

8

Explanation:

pH = It is the negative logarithm of activity (concentration) of hydrogen ions.

pH = -log([H+])

Now, In the question the concentration of [H+] ions is :

$[H^{+}]=1\times 10^{-8}$

$pH = -log(1\times 10^{-8})$

use the relation:

$log(10^{-a})=a$

$pH= -(-8)$

pH = 8

Note : 1 times 10 to the power of 8 must be" 1 times 10 to the power of -8"

If the concentration is

$[H^{+}]=1\times 10^{8}$

Then pH = -8 , which is not possible . So in that case the pH calculation is by other method

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2 years ago

How many liters are in 3.45 moles of oxygen gas at STP?

just olya [345]

Answer:

22.4L of one mole of any gas

or you can use PV=nRT

3.45*22.4=77.28

Explanation:

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2 years ago

What is the energy required to go from a solid to a liquid called?

jek_recluse [69]

Answer:

C. The thermal energy of a substance.

Explanation:

Hope it helps.

3 0

2 years ago

Identify earths lithospheric plates

kolezko [41]

Answer:

Lithospheric plates are regions of Earth's crust and upper mantle that are fractured into plates that move across a deeper plasticine mantle. Earth's crust is fractured into 13 major and approximately 20 total lithospheric plates.

Explanation:

I hope this helps

8 0

2 years ago