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AleksAgata [21]

3 years ago

7

Please Help ASASP i need help

1 answer:

WINSTONCH [101]3 years ago

4 0

Answer:

A

Explanation:

Its a because the temperature is increasing( getting warmer)

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Please Help!!! 15 Points

Irina18 [472]

Riding your bike, you can accelerate at a rate of 2m/s^2. If you start from rest, how long will it take to reach a speed of 20m/s?

3 0

3 years ago

If an element has 2 fewer protons than boron, what is its electron configuration?

REY [17]

So boron has an electronic configuration of 1S2 2S2 2P1 and the element with an atomic number of 3 is Lithium which has an electronic configuration of 1S2 2S1.

So the answer is 1S2 2S1.

8 0

4 years ago

Being aware you are dreaming while having a dream is called lucid dreaming.?

melomori [17]

Yes it is, because lucid means characterized by clear perception.

5 0

4 years ago

Read 2 more answers

What would be the composition and ph of an ideal buffer prepared from lactic acid (ch3chohco2h), where the hydrogen atom highlig

Mashutka [201]

Answer:

$P_H =2.86$

$c=1.4\times 10^{-4}$

Explanation:

first write the equilibrium equaion ,

$C_3H_6O_3$ ⇄ $C_3H_5O_3^{-} +H^{+}$

assuming degree of dissociation $\alpha$ =1/10;

and initial concentraion of $C_3H_6O_3$ =c;

At equlibrium ;

concentration of $C_3H_6O_3 = c-c\alpha$

$[C_3H_5O_3^{-} ]= c\alpha$

$[H^{+}] = c\alpha$

$K_a = \frac{c\alpha \times c\alpha}{c-c\alpha}$

$\alpha$ is very small so $1-\alpha$ can be neglected

and equation is;

$K_a = {c\alpha \times \alpha}$

$[H^{+}] = c\alpha$ = $\frac{K_a}{\alpha}$

$P_H =- log[H^{+} ]$

$P_H =-logK_a + log\alpha$

$K_a =1.38\times10^{-4}$

$\alpha = \frac{1}{10}$

$P_H= 3.86-1$

$P_H =2.86$

composiion ;

$c=\frac{1}{\alpha} \times [H^{+}]$

$[H^{+}] =antilog(-P_H)$

$[H^{+} ] =0.0014$

$c=0.0014\times \frac{1}{10}$

$c=1.4\times 10^{-4}$

6 0

4 years ago

Oxidation number of the Nitrogen Family is...<br> -3<br> -1<br> +3<br> 0

Zarrin [17]

Answer:

+3

Explanation:

Follows oxidation rules.

Hope this helped! Let me know if you need further explanation.

3 0

3 years ago