Which microscope came out first
1 answer:
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Answer:
- <u>0.42mg</u>
Explanation:
A <em>second order process</em> for the <em>elimination </em>(disappearance) of a substance, B, follows the law:
Whose integrated form is:
You are given:
- B₀ = 10mg
- k = 7.6 × 10⁻³ min⁻¹
- t = 5.0hours = 300 min
Then, just subsititute and compute:
(notice that the units of k should be mg⁻¹·min⁻¹)
Lewis Structure of Oxygen Difluoride is sketched as....
Step 1:
Calculate the total number of valence electrons present in OF₂. This is done by adding all valence electrons of each element. i.e...
Valence e⁻s of Oxygen = 6
Valence e⁻s of Fluorine-1 = 7
Valence e⁻s of Fluorine-2 = 7
------------
Total Valence e⁻s 20
Step 2:
Draw central element (O) in center surrounded by fluorine atoms. Now, sketch a single bonds between O and both F atoms. Now, subtract 2 electrons per single bond from total valence electrons.. i.e..
Total Valence e⁻s = 20
2 single bonds (2 × 2) = 4
-----------
16
Now, distribute remaining 16 electrons on each element to complete its octet starting from most electronegative element.
Lewis structure of OF₂ is as follow,
Step 1:
Calculate the total number of valence electrons present in OF₂. This is done by adding all valence electrons of each element. i.e...
Valence e⁻s of Oxygen = 6
Valence e⁻s of Fluorine-1 = 7
Valence e⁻s of Fluorine-2 = 7
------------
Total Valence e⁻s 20
Step 2:
Draw central element (O) in center surrounded by fluorine atoms. Now, sketch a single bonds between O and both F atoms. Now, subtract 2 electrons per single bond from total valence electrons.. i.e..
Total Valence e⁻s = 20
2 single bonds (2 × 2) = 4
-----------
16
Now, distribute remaining 16 electrons on each element to complete its octet starting from most electronegative element.
Lewis structure of OF₂ is as follow,