3 years ago

How many molecules of F2 are there in 4.2 mol F2?

1 answer:

7 0

Hey there!

1 mol has 6.022 x 10²³ molecules.

If we have 4.2 mol F₂, multiply the number of molecules in 1 mol by 4.2.

4.2 x 6.022 x 10²³

2 sig figs

25 x 10²³

Put this properly into scientific notation.

2.5 x 10²⁴ molecules of F₂

Hope this helps!

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Bogdan [553]

Matter can only me transformed, but not created or destroyed.

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4 years ago

GalinKa [24]

Answer:

Structure has been shown below

Explanation:

In a Lewis structure, least electronegative atom is taken as central atom (except H)
Total valence electrons of constituting atoms are used to construct Lewis structure
A bond between two atoms are represented by a horizontal line or a dotted line (two dots).
Spatial rearrangement of atoms are neglected in Lewis structure.
H has one valence electron and O has six valence electrons. So, total valence electrons in $H_{2}O$ are 8
Lewis structure of $H_{2}O$ has been given below.