Chemistry: In order to draw a Lewis structure, it is important to . * a. determine the atomic number of each atom in the molecule b. add unshared pairs of electrons only around nonmetal atoms c. determine the total number of valence electrons in each atom d. determine the electronegativity of each atom

In order to draw a Lewis structure, it is important

Ответ:

bryanmcmillianjr

06.02.2022

Chemistry

C. Determine the total number of valence electrons in each atom

Explanation: That’s the main thing that a Lewis structure/ e-dot diagram shows!

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Ответ:

Daxtyn

16.05.2023

Chemistry

The mass of each substance can be found through stoichiometric calculation as follows:

$\frac{g}{u} = \frac{a}{C}$

where "g" is the mass of substance, "u" is the relative atomic mass, "a" is the number of atoms or molecules and "C" is Avogadro's number.

Making use of that formula, we have:

a) 6.02 x 10²³ atoms of Mg.

$
\frac{g}{24.3}= \frac{6.02\times 10^{23}}{6.02 \times10^{23}} \\ \boxed {g= 24.3~g}$

b) 12.4 x 10¹⁵ molecules of CH₂O.

$\frac{g}{12+2 \times 1+16}= \frac{12.4\times 10^{25}}{6 \times10^{23}} \\ g= \frac{30 \times 12.4 \times 10^{25}}{6 \times10^{23}} \\ \boxed {g= 6.2~kg}$

c) 3.01 x 10²³ formula units of CaCl₂

$\frac{g}{40+2 \times 35.5}= \frac{3.01 \times 10^{25}}{6 \times10^{23}} \\ g= \frac{111 \times 3.01 \times 10^{25}}{6 \times10^{23}} \\ \boxed {g= 5.5685~kg}$

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In order to draw a Lewis structure, it is important to . * a. determine the atomic number of each atom in the molecule
b. add unshared pairs of electrons only around nonmetal atoms
c. determine the total number of valence electrons in each atom
d. determine the electronegativity of each atom

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