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Karo-lina-s [1.5K]
3 years ago
15

A halloon has a volume of 456 mL at a pressure of 1.0 atm. It is taken under water in

Chemistry
1 answer:
goldenfox [79]3 years ago
5 0
If someone sends a link don’t go to it, they use them to find your address
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Find [H+] of a 0.056 M hydrofluoric acid solution. Ka = 1.45 x 10-7
brilliants [131]

Answer:  [H^+] of 0.056 M HF solution is 8.96\times 10^{-5}

Explanation:

HF\rightarrow H^+F^-

 cM              0             0

c-c\alpha        c\alpha          c\alpha  

So dissociation constant will be:

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

Give c= 0.056 M and \alpha = ?

K_a=1.45\times 10^{-7}

Putting in the values we get:

1.45\times 10^{-7}=\frac{(0.056\times \alpha)^2}{(0.056-0.056\times \alpha)}

(\alpha)=0.0016

[H^+]=c\times \alpha

[H^+]=0.056\times 0.0016=8.96\times 10^{-5}  

Thus [H^+] of 0.056 M HF solution is 8.96\times 10^{-5}

8 0
3 years ago
Explain how lone pairs of electrons influence the shape of a molecule.
Ronch [10]

Explanation:

the lone pairs will be negatively charged. these have a repulsion effect on other negatively charged electrons in the shells of atoms. picture a water molecule: the lone electron pair on the top of the oxygen will have a repulsion force on the 2 hydrogen atom's orbiting electrons to cause a bent molecular geometry.

3 0
2 years ago
What does atomic mass on the periodic table represent?
neonofarm [45]
The atomic mass on the periodic table represents the sum of number of protons and number of neutrons.

Atomic mass = Number of protons + number of neutrons

Hope this helps!
6 0
3 years ago
What is formed when atoms of different elements combined.
ki77a [65]

Answer:A molecule is formed when two or more atoms join together chemically.

Explanation:

6 0
3 years ago
Which use of iron is due to its chemical properties?
Annette [7]

Answer:

changes from liquid to gas at 2,862°C

Explanation:

chemical changes are where you can't go back or change what's made. you can't change it after it's a gas.

4 0
3 years ago
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