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sertanlavr [38]

3 years ago

10

Pick one answer do not put any links please

1 answer:

skelet666 [1.2K]3 years ago

3 0

The answer is D! This adaptation helps the eel fend off potential threats! Hope this helps, have a great day!

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What causes dipole interactions?

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Attraction between polar molecules

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3 years ago

In order to predict whether or not a single replacement reaction takes place you need to consult a chart that shows the

erastova [34]

<span>Activity series of metals. it is a series of metals based on their reactivity from highest to lowest. Potassium occupies the top most level of reactivity. The reactivity means the ability to displace hydrogen gas from water and acid solutions.</span>

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3 years ago

Calcium hydroxide is a strong base but is not very soluble ( Ksp = 5.02 X 10-6 ). What is the pH of a saturated solution of Ca(O

Misha Larkins [42]

Answer : The pH of a saturated solution is, 12.33

Explanation : Given,

$K_{sp}$ = $5.02\times 10^{-6}$

First we have to calculate the solubility of $OH^-$ ion.

The balanced equilibrium reaction will be:

$Ca(OH)_2\rightleftharpoons Ca^{2+}+2OH^-$

Let the solubility will be, 's'.

The concentration of $Ca^{2+}$ ion = s

The concentration of $OH^-$ ion = 2s

The expression for solubility constant for this reaction will be,

$K_{sp}=[Ca^{2+}][OH^-]^2$

Let the solubility will be, 's'

$K_{sp}=(s)\times (2s)^2$

$K_{sp}=(4s)^3$

Now put the value of $K_[sp}$ in this expression, we get the solubility.

$5.02\times 10^{-6}=(4s)^3$

$s=1.079\times 10^{-2}M$

The concentration of $Ca^{2+}$ ion = s = $1.079\times 10^{-2}M$

The concentration of $OH^-$ ion = 2s = $2\times (1.079\times 10^{-2}M)=2.158\times 10^{-2}M$

First we have to calculate the pOH.

$pOH=-\log [OH^-]$

$pOH=-\log (2.158\times 10^{-2})$

$pOH=1.67$

Now we have to calculate the pH.

$pH+pOH=14\\\\pH=14-pOH\\\\pH=14-1.67=12.33$

Therefore, the pH of a saturated solution is, 12.33

7 0

3 years ago

The percentage of water vapor present in the air compared to that required for saturation is the ____. a. mixing ratio b. relati

Ivan

Answer:

B. Relative Humidity

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3 years ago

const2013 [10]

$\huge{ \mathrm{ \underline{ Answer }\: \: ✓ }}$

The relationship between mass of matter per unit volume is known as :

$\large \boxed{ \mathrm{density}}$

_____________________________

$\mathrm{ ☠ \: TeeNForeveR \:☠ }$

8 0

3 years ago