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3 years ago

Why would putting argon and pottassium in order of there atomic masses be wrong

Chemistry

1 answer:

coldgirl [10]3 years ago

8 0

Putting them in that oder can be absolutely wrong becaus they are not in the same group of the periodic table

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As an atom's nucleus gets larger the electric charges repelling the protons get larger. To compensate for this greater electric

IrinaK [193]

i think the greater the electric charge the atom decreases in size

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3 years ago

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Explain why ionic compound do not form molecules.

Darina [25.2K]

Answer:

Because a molecule, by definition, has a valence of zero

(neutral charge, stable). Also by definition, an ion has a positive

or negative charge or valence and is not stable.

Explanation:

7 0

3 years ago

This protein takes oxygen from hemoglobin in order to

never [62]

Answer:

i'm pretty sure it's 'transport oxygen from the lungs to tissues around the body'

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3 years ago

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A solution made by dissolving 33 mg of insulin in 6.5 mL of water has an osmotic pressure of 15.5 mmHg at 25°C. Calculate the mo

Liula [17]

<u>Answer:</u> The molar mass of the insulin is 6087.2 g/mol

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iMRT$

Or,

$\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT$

where,

$\pi$ = osmotic pressure of the solution = 15.5 mmHg

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (insulin) = 33 mg = 0.033 g (Conversion factor: 1 g = 1000 mg)

Volume of solution = 6.5 mL

R = Gas constant = $62.364\text{ L.mmHg }mol^{-1}K^{-1}$

T = temperature of the solution = $25^oC=[273+25]=298K$

Putting values in above equation, we get:

$15.5mmHg=1\times \frac{0.033\times 1000}{\text{Molar mass of insulin}\times 6.5}\times 62.364\text{ L.mmHg }mol^{-1}K^{-1}\times 298K\\\\\text{molar mass of insulin}=\frac{1\times 0.033\times 1000\times 62.364\times 298}{15.5\times 6.5}=6087.2g/mol$

Hence, the molar mass of the insulin is 6087.2 g/mol

8 0

3 years ago

Place the following covalent bonds in order from least to most polar: a. H-Cl b. H-Br c. H-S d. H-C

timofeeve [1]

Answer:

The Order is as follow,

C-H < S-H < H-Br < H-Cl

Explanation:

Polarity depends on the electronegativity difference between two atoms, greater the electronegativity difference, greater will be the polarity of bond and vice versa.

Electronegativity Difference between Hydrogen and other given elements are as follow,

1) C-H;

E.N of Carbon = 2.55

E.N of Hydrogen = 2.20

------------

Difference 0.35

2) S-H;

E.N of Sulfur = 2.58

E.N of Hydrogen = 2.20

------------

Difference 0.38

3) H-Br;

E.N of Bromine = 2.96

E.N of Hydrogen = 2.20

-------------

Difference 0.76

4) H-Cl;

E.N of Chlorine = 3.16

E.N of Hydrogen = 2.20

-----------

Difference 0.96

Hence it is proved that the greatest electronegativity difference is found between H and Chlorine in H-Cl, therefore it is highly polar bond and vice versa.

7 0

3 years ago