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3 years ago

6

What changes in our sleep habits as we mature and why?

1 answer:

Yanka [14]3 years ago

6 0

Well, while we change in age, out sleep habits change too.

For instance, when we used to be in our teen age, we used to wake up late. Or, Now that were adults around our 20's we tend to wake up very early. Age tends to change out sleep of ways. Its always good to get at least 7 hours of sleep.

Hoped I answered you question. :)

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Which of the following would be a qualitative observation? A The volume of the solution is 25 ml B The solution turned blue C Th

mariarad [96]

B

A qualitative observation describes the characteristics of a substance without quantifying them.

3 0

4 years ago

An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal. In which section of the ta

katrin2010 [14]

Answer:

you would find it in section 3 as these are semi-metals

Explanation:

3 0

3 years ago

Read 2 more answers

In a aqueous solution of 4-chlorobutanoic acid , what is the percentage of -chlorobutanoic acid that is dissociated

lord [1]

Answer:

Explanation:

Let assume that the missing aqueous solution of 4-chlorobutanoic acid = 0.76 M

Then, the dissociation of 4-chlorobutanoic acid can be expressed as:

$\mathsf{C_3H_6ClCO_2H }$ ⇄ $\mathsf{C_3H_6ClCO_2^-}$ + $\mathsf{H^+}$

The ICE table can be computed as:

$\mathsf{C_3H_6ClCO_2H }$ ⇄ $\mathsf{C_3H_6ClCO_2^-}$ + $\mathsf{H^+}$

Initial 0.76 - -

Change -x +x +x

Equilibrium 0.76 - x x x

$K_a = \dfrac{[\mathsf{C_3H_6ClCO_2^-}] [\mathsf{H^+}]}{\mathsf{[C_3H_6ClCO_2H ]}}$

$K_a = \dfrac{[x] [x]}{ [0.76-x]}$

where:

$K_a = 3.02*10^{-5}$

$3.02*10^{-5} = \dfrac{x^2}{ [0.76-x]}$

however, the value of x is so negligible:

0.76 -x = 0.76

Then:

$3.02*10^{-5}*0.76 = x^2$

$x=\sqrt{3.02*10^{-5}*0.76 }$

x = 0.00479 M

∴

$x = \mathsf{[C_3H_6ClCO_2^-] = [H^+]=}$ 0.00479 M

$\mathsf{C_3H_6ClCO_2H }$ = (0.76 - 0.00479) M

= 0.75521 M

Finally, the percentage of the acid dissociated is;

= ( 0.00479 / 0.76) × 100

= 0.630 M

7 0

3 years ago

Please help me urgent!

loris [4]

It decreases in volume, as the energy is lost.

4 0

3 years ago

PLEASE HELP THANKSS-

mrs_skeptik [129]

A homogenous mixture has uniformly dispersed components while a heterogeneous mixture does not.

<h3>Homogenous vs heterogeneous mixtures</h3>

First of all, both homogenous and heterogenous mixtures consist of 2 or more non-reacting chemical components.

In homogenous mixtures, the chemical components are uniformly dispersed throughout the entire mixture.

In heterogeneous mixtures, the reverse is the case. The components are not uniformly dispersed. They are skewed to a particular side.

More on mixtures can be found here: brainly.com/question/24898889

#SPJ1

6 0

2 years ago