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2 years ago

8

. Which law of motion relates the action of a stretched rubber band

1 answer:

storchak [24]2 years ago

3 0

Answer:

newtons 3rd law of motion

Explanation:

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Antacid has a pH of 11. What does that tell you about its concentration of hydrogen ions? What does that tell you about its conc

MAVERICK [17]

Answer: The concentration of hydrogen ions is $10^{-11}M$ and the concentration of hydroxide ions is $10^{-3}M$ . Thus the concentration of hydroxide ions is more than the concentration of hydrogen ions.

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

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

Putting in the values:

$11=-\log[H^+]$

$[H^+]=10^{-11}M$

$pH+pOH=14$

$pOH=14-11=3$

$3=-log[OH^-]$

$[OH^-]=10^{-3}M$

Thus the concentration of hydroxide ions is more than the concentration of hydrogen ions.

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3 years ago

Atoms of most nonmetallic elements achieve noble-gas electron configurations by ____________electrons to become anions , or ____

horrorfan [7]

1) gaining

2) negatively

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3 years ago

What are the observed effects of sleep deprivation on leptin and ghrelin?

Afina-wow [57]

Answer:

Lack of sleep increases hunger hormone ghrelin and decreases the satiety hormone leptin which may help explain the association between inadequate sleep and overweight.

Explanation:

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3 years ago

Consider the chemical equation for the ionization of CH3NH2 in water. Estimate the percent ionization of CH3NH2 in a 0.050 M CH3

anyanavicka [17]

Answer: The percent ionization of $CH_3NH_2$ in a 0.050 M $CH_3NH_2(aq)$ solution is 8.9 %

Explanation:

$CH_3NH_2+H_2O\rightarrow OH^-+CH_3NH_3^+$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_b=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= concentration = 0.050 M and $\alpha$ = degree of ionisation = ?

$K_b=4.4\times 10^{-4}$

Putting in the values we get:

$4.4\times 10^{-4}=\frac{(0.050\times \alpha)^2}{(0.050-0.050\times \alpha)}$

$(\alpha)=0.089$

percent ionisation = $0.089\times 100=8.9\%$

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2 years ago

Density is given in ____. a. Pa/cm3 c. g/s2 b. N/m2 d. g/cm3 Please select the best answer from the choices provided A B C D

Ray Of Light [21]

Density is given in Mass/Volume so the answer is D

7 0

3 years ago

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