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2 years ago

What happens to the end of the O2 molecule that is closest to the positive end of the H2O molecule?

1 answer:

6 0

Answer:When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule. Water molecules attract one another based on the attraction between the positive end of one water molecule and the negative end of another.

Explanation:

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Uranium-238 decays to lead-206 with a half-life of 4.5 x 109 yr. Determine how much uranium-238 decays in milligrams (to three s

Mamont248 [21]

Answer:

2.15 mg of uranium-238 decays

Explanation:

For decay of radioactive nuclide-

$N=N_{0}.(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$

where N is amount of radioactive nuclide after t time, $N_{0}$ is initial amount of radioactive nuclide and $t_{\frac{1}{2}}$ is half life of radioactive nuclide

Here $N_{0}=4.60 mg$ , $t=4.1\times 10^{9}yr$ and $t_{\frac{1}{2}}=4.5\times 10^{9}yr$

So, $N=(4.60mg)\times (\frac{1}{2})^{\frac{4.1\times 10^{9}}{4.5\times 10^{9}}}$

so, N = 2.446 mg

mass of uranium-238 decays = (4.60-2.446) mg = 2.15 mg

3 0

3 years ago

What volume of a 1.0 M HCl is required to completely neutralize 25.0 ml of a 1.0 M KOH?

kirza4 [7]

The question above can be solved by using this equation:
CAVA =CBVB
Where:
CA =Concentration of acid = 1.0 M
VA = Volume of acid = ?
CB = Concentration of base = 1.0 M
VB = Volume of base = 25 ml
VA = CBVB / CA
VA = [1 * 25] / 1 = 25 / 1 = 25
VA = 25 ml
Therefore, the volume of acid that is required to completely neutralize the base is 25 ml.<span />

8 0

3 years ago

Difference between qualitative and quantitative data in chemistry

const2013 [10]

Quantitative data is numerical.
Qualitative data is non-numerical.
Hope this helps.
have a great day.

7 0

3 years ago

(?)H2 + (?)O2 -----> (?)H2O

kkurt [141]

Answer:

2 H2 +O2 = 2H2O

Explanation:

7 0

3 years ago

Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force. Choose the molecule or co

nadezda [96]

Answer:

O2 - exhibits dispersion forces as its strongest intermolecular force.

Explanation:

Generally speaking, all biatomic homonuclear molecules, such as N2, O2, F2, do NOT have any dipole moment: the distibution of the nuclear clouds is symmetrical. They are non-polar.

For what concerns heteronuclear molecules, it depends on their geometry.

Dispersion force ( Van der Waal)< dipole dipole < hydrogen bond

Intermolecular forces are forces of attraction between molecules/atoms based mainly on the idea of like charges repel and opposite charges attract.

Based on the polarity of the substance, the type of intermolecular forces existing between substance may be different.

4 0

3 years ago