Tema
Q:
5. Which electrons are involved in determining the 3-dimensional shape of a
molecule?
a) The lone pair (non-bonding) valence electrons on the central atom
b) The covalent bonds on the central atom
c) Both a and b
d) Neither a nor b
Q:
4. In VSEPR theory, which repels other electron groups more strongly?
a) bonded electron pair
b) non-bonding electron pair
Q:
3. If you had a substance that water will not dissolve, then which of the
following compounds would you choose to dissolve this substance:
a) Any nonpolar liquid
b) Any polar liquid
c) Any ionic liquid
Q:
2. A bond that consists of equal sharing of electrons is:
a) Ionic bond
b) Nonpolar covalent
c) Polar covalent
d) Polyatomic ion
Q:
1. How many carbon atoms are in an \( \mathrm{Al}_{2}\left(\mathrm{CO}_{3}\right)_{3} \) molecule?
a) 12
b) 9
c) 6
d) 3
Q:
iv. Calcular el volumen en mL de \( \mathrm{HNO}_{3} \) comercial necesario para preparar 250 mL de
disolución o.1 M de \( \mathrm{HNO}_{3} \) a partir de ácido nítrico comercial de densidad \( 1,4 \mathrm{~g} / \mathrm{mL} \) y
porcentaje en peso \( 64 \% \mathrm{p} / \mathrm{p} \).
Q:
The half-life of radium is 1690 years. If 70 grams are present now, how much will be present in 190 years?
grams
(Do not round until the final answer. Then round to the nearest thousandth as needed.)
Q:
ค. \( \mathrm{H}_{2} \mathrm{PO}_{4}^{-}-\mathrm{HPO}_{4}^{2-} \)
Q:
At \( 25^{\circ} \mathrm{C} \) calolum fluoride has a solubility product constant \( K_{\text {sp }}=3.0 \times 10^{-1 t} \). The
solubility of \( \mathrm{CaF}_{2} \) at this temperature is _ moli
Q:
Question 10 (1 point)
Provide the correct name for the molecule below, Do not capitalize any letters.
\( \mathrm{Cs}_{2} \mathrm{O} \)
The name of this molecule is
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