Ask question

Ask question

All categories

3 years ago

8

Scientists excavating at the bottom of the ocean come across fossilized remains of an ancestor of a mountain goat. How can this

be explained?

1 answer:

galina1969 [7]3 years ago

4 0

There was land on that surface before there was water

You might be interested in

Label the sun. which layer of the sun is #3?

horsena [70]

Answer:

Explanation:

corona

4 0

3 years ago

Why is Cesium more reactive than Lithium??? Please help

Contact [7]

Answer: Cesium is more reactive toward water than lithium because the ionization energy decreases down the group reactivity increases down the group.

Explanation: Please mark me as brainliest and i hope that helped!

5 0

3 years ago

Calculate [H3O+] and [OH−] for each of the following solutions at 25 ∘C given the pH.<br> pH= 2.89

dimaraw [331]

Answer: The value of $[H_{3}O^{+}]$ is 0.0012 M and $[OH^{-}]$ is $1.02 \times 10^{-14}$ .

Explanation:

pH is the negative logarithm of concentration of hydrogen ion.

It is given that pH is 2.89. So, the value of concentration of hydrogen ions is calculated as follows.

$pH = - log [H^{+}]\\2.89 = - log [H^{+}]\\conc. H^{+} = 0.0012 M$

The relation between pH and pOH value is as follows.

pH + pOH = 14

0.0012 + pOH = 14

pOH = 14 - 0.0012 = 13.99

Now, pOH is the negative logarithm of concentration of hydroxide ions.

Hence, $[OH^{-}]$ is calculated as follows.

$pOH = - log [OH^{-}]\\13.99 = - log [OH^{-}]\\conc. OH^{-} = 1.02 \times 10^{-14} M$

Thus, we can conclude that the value of $[H_{3}O^{+}]$ is 0.0012 M and $[OH^{-}]$ is $1.02 \times 10^{-14}$ .

6 0

3 years ago

Which of sully's traits are

Lemur [1.5K]

yes, their traits are

and

sometimes

7 0

3 years ago

Read 2 more answers

How many per tickets are in one mole?

Alexeev081 [22]

Answer:

Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.

Explanation:

7 0

3 years ago