Elements in the same group on the periodic table have the same number of valence electrons. The "groups" are the column (or rows). groups are vertically and periods are horizontally.

6 0

3 years ago

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What do you think the body does to try and maintain its balanced pH considering the wide range of acidic and basic substances in

sleet_krkn [62]

The lungs control your body's pH balance by releasing carbon dioxide. Carbon dioxide is a slightly acidic compound. ... Your brain constantly monitors this in order to maintain the proper pH balance in your body. The kidneys help the lungs maintain acid-base balance by excreting acids or bases into the blood.

Sorry if it’s wrong I’m not that sir and best luck with your studying

4 0

3 years ago

What is the boiling point of methanol, if ∆H°for vaporization is 35.3 kJ/mol, and ∆S° for vaporization is 105 J/mol K?

QveST [7]

Answer: 336.2K

Explanation:

The boiling point is obtained from the standard enthalpy and entropy of vaporization as shown in the image attached.

Standard enthalpy of vaporization=35.3KJmol-1=35.3×10^3 Jmol-1

Standard entropy of vaporization= 105 JMol-1K-1

The formula and details of the solution are shown in the image attached.

6 0

3 years ago

9) How long would it take 100 molecules of valinomycin to transport enough K+ to change the concentration inside an erythrocyteo

Alenkinab [10]

Answer: Time required for 100 molecules of valinomycin to transport enough $K^{+}$ to change the concentration inside an erythrocyte is 10 minutes.

Explanation:

The given data is as follows.

Ions to be transported = $(10 mM) \times (100 \mu^{3})(N)$

= $0.010 mol \times 10^{-13} L \times 6.02 \times 10^{23} ions/mol$

= $6.02 \times 10^{6}$ ions

Here, there are 100 ionophores are present and each one of ionophores are required to transport a value of ions.

Therefore, the time required for 100 molecules of valinomycin to transport enough $K^{+}$ to change the concentration inside an erythrocyte is as follows.

$6.02 \times 10^{6} ions \times \frac{1 sec}{10^{4} ions}$

= 602 sec

or, = 10 minutes (as 1 min = 60 sec)

Thus, we can conclude that time required for 100 molecules of valinomycin to transport enough $K^{+}$ to change the concentration inside an erythrocyte is 10 minutes.

3 0

3 years ago