Tema
Q:
Potassium permanganate is produced commercially by the this reaction:
\[ \mathrm{K}_{2} \mathrm{MnO}_{4}(\mathrm{aq})+\mathrm{Cl}_{2}(\mathrm{~g})+\mathrm{KMnO}_{4}(\mathrm{~s})+\underset{\mathrm{Cl}}{+}+\mathrm{KCl}(\mathrm{aq}) \]
What volume of chlorine gas at STP would be required to produce 10.0 grams of \( \mathrm{KMnO}_{4} \) ?
Q:
Balancear por rédox:
\( \mathrm{Kl}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{H}_{2} \mathrm{~S}+\mathrm{H}_{2} \mathrm{O}+\mathrm{I}_{2}+\mathrm{K}_{2} \mathrm{SO}_{4} \)
Q:
Question 4.
There are four structural isomers of CaltoBr. Give the full structural formula and name of,
isomer in the space provided below:
Q:
Which is the correct Lewis structure for hydrogen peroxide, \(H_ { 2} O_ { 2} \)?
Q:
Question 3.
There are five structural isomers of \( \mathrm{C}_{6} \mathrm{H}_{14} \). Give the full structural formula and name of
isomer in the space provided below:
Q:
Un vaso de 240 ml de una bebida a base de té aporta 25 mg de Sodio. Dentro de los componentes de la
bebida se encuentra el citrato de sodio \( \mathrm{Na}_{3} \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}_{7} \) el cual se emplea para regular la acidez de la bebida.
¿Cuantos mg de citrato de sodio se requieren para preparar una botella de 400 mL ? El Citrato de sodio
son cristales blancos. Reactivo analitico de alta pureza.
Q:
7. The molecular shape that has a \( 107^{\circ} \) bond angle is
a) Tetrahedral
b) Linear
c) Pyramidal
d) Bent
Q:
6. The molecular shape that has a \( 109^{\circ} \) bond angle is
a) Tetrahedral
b) Pyramidal
c) Bent
d) linear
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
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