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OLga [1]
3 years ago
14

if two atoms share electrons how does knowledge of the electronegativity of each atom help determine if the bond will be polar

Chemistry
2 answers:
Serggg [28]3 years ago
4 0

Answer:

share

Explanation:

bulgar [2K]3 years ago
3 0
Whether a bond is nonpolar or polar covalent is determined by a property of the bonding atoms called electronegativity. ... It determines how the shared electrons are distributed between the two atoms in a bond. The more strongly an atom attracts the electrons in its bonds, the larger its electronegativity.
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A chemical reaction has reached equilibrium when ________. all products have been removed from the reaction mixture the catalyst
soldier1979 [14.2K]

rate of forward reaction

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Determine the root-mean square speed of CO2 molecules that have an average kinetic energy of 4.2 x10-21 J per molecule.
strojnjashka [21]
<span>Determine the root-mean-square sped of CO2 molecules that have an average Kinetic Energy of 4.21x10^-21 J per molecule. Write your answer to 3 sig figs.
</span><span>
E = 1/2 m v^2 

If you substitute into this formula, you will get out the root-mean-square speed. 

If energy is Joules, the mass should be in kg, and the speed will be in m/s. 

1 mol of CO2 is 44.0 g, or 4.40 x 10^1 g or 4.40 x 10^-2 kg. 

If you divide this by Avagadro's constant, you will get the average mass of a CO2 molecule. 

4.40 x 10^-2 kg / 6.02 x 10^23 = 7.31 x 10^-26 kg 

So, if E = 1/2 mv^2 

</span>v^2 = 2E/m = 2 (4.21x10^-21 J)/7.31 x 10^-26 kg = 115184.68 
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8 0
3 years ago
Water exhibits high levels of cohesion due to the polarity of the molecule (positively and negatively charged sides). given this
nalin [4]
Covalent bonds and it is between the hydrogens (hydrogen bonds)
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The half life of potassium 40 is approximately 1.25 billion years. An igneous rock is found to contain about 1/4 of its original
vodomira [7]

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4 0
3 years ago
A chemist must prepare 800.0mL of sodium hydroxide solution with a pH of 12.10 at 25°C. She will do this in three steps: Fill a
AnnZ [28]

Answer:

0.42 g

Explanation:

<u>We have: </u>

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V = 800.0 mL = 0.800 L    

To find the mass of sodium hydroxide (NaOH) we can use the pH:

14 = pH + pOH

pOH = 14 - pH = 14 - 12.10 = 1.90

pOH = -log ([OH^{-}])

[OH]^{-} = 10^{-pOH} = 10^{-1.90} = 0.013 M

Now, we can find the number of moles (η) of OH:

\eta = ([OH]^{-})*V = 0.013 mol/L * 0.800 L = 1.04 \cdot 10^{-2} moles

Since we have 1 mol of OH in 1 mol of NaOH, the number of moles of NaOH is equal to 1.04x10⁻² moles.

Finally, with the number of moles we can find the mass of NaOH:

m = \eta * M

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m = 1.04 \cdot 10^{-2} moles * 39.9 g/mol = 0.42 g

Therefore, the mass of sodium hydroxide that the chemist must weigh out in the second step is 0.42 g.

I hope it helps you!

3 0
3 years ago
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