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3 years ago

What happens to the oceanic crust at a deep ocean floor

1 answer:

3 0

Mid-ocean ridges and seafloor spreading can also influence sea levels. As oceanic crust moves away from the shallow mid-ocean ridges, it cools and sinks as it becomes more dense.

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What is the pH of a solution with (H+] = 1 x 103 M?

luda_lava [24]

It is 5 hope this helps

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3 years ago

Which technique would be best for separating sand and water?

ipn [44]

Answer:

A. filtration

Hope it helps

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3 years ago

How many moles of gold are equivalent to 1.204 × 1024 atoms?

LUCKY_DIMON [66]

Explanation:

It is known that the value of Avogadro's number is $6.022 \times 10^{23}$ .

Therefore, calculate moles of gold atoms as follows.

Moles of gold atom = $\frac{given number of atoms}{Avogadro's number}$

= $\frac{1.204 \times 10^{24}}{6.022 \times 10^{23}mol^{-1}}$

= $0.199 \times 10$ mol

= 1.99 mol

Thus, we can conclude that 1.99 mol of gold atoms are equivalent to $1.204 \times 10^{24}$ atoms.

7 0

3 years ago

Read 2 more answers

Calculate the pH of a solution that is 0.235M benzoic acid and 0.130M sodium benzoate, a salt whose anion is the conjugate base

lesantik [10]

Hello!

We have the following data:

ps: we apply Ka in benzoic acid to the solution.

[acid] = 0.235 M (mol/L)

[salt] = 0.130 M (mol/L)

pKa (acetic acid buffer) =?

pH of a buffer =?

Let us first find pKa of benzoic acid, knowing that Ka (benzoic acid) = $6.20*10^{-5}$

So:

$pKa = - log\:(Ka)$

$pKa = - log\:(6.20*10^{-5})$

$pKa = 5 - log\:6.20$

$pKa = 5 - 0.79$

$\boxed{pKa = 4.21}$

Now, using the abovementioned data for the pH formula of a buffer solution or (Henderson-Hasselbalch equation), we have:

$pH = pKa + log\:\dfrac{[salt]}{[acid]}$

$pH = 4.21 + log\:\dfrac{0.130}{0.235}$

$pH = 4.21 + log\:0.55$

$pH = 4.21 + (-0.26)$

$pH = 4.21 - 0.26$

$\boxed{\boxed{pH = 3.95}}\end{array}}\qquad\checkmark$

Note:. The pH <7, then we have an acidic solution.

I Hope this helps, greetings ... DexteR! =)

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3 years ago

PLZ LOOK AT ALL THE QUESTIONS. IF YOU GET THEM ALL, YOU ARE A GOD!!

Brut [27]

B cause it tells how it moves

7 0

3 years ago