b. molality.
c. parts per million.
(2) CH3CH2CH2CH3
(3) CH3CH2CH2COOH
(4) CH3CH2COOCH3
formula represents a hydrocarbon. Therefore, option (2) is correct.
Hydrocarbons are merely carbon and hydrogen. Aliphatic or aromatic. Aliphatic hydrocarbons are saturated or unsaturated open-chain hydrocarbons.Saturated aliphatic hydrocarbons have single bonds, while unsaturated ones have double or triple bonds.
Aromatic hydrocarbons have alternating double bonds in a ring.Only option 2——is a hydrocarbon. Butane, a saturated aliphatic hydrocarbon, with four carbon and 10 hydrogen atoms.
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B. observed wavelength of light
C. speed of light
D. mass of the particulate matter
Answer: B. observed wavelength of light
Explanation: The relation of Planck's constant relating the Joules of energy absorbed/released by matter is usually used to determine the energy of the photon. The mathematical expression is -
E= h c /
Thus as we can observe that the energy is directly proportional to the speed of light and inversely proportional to the wavelength of the light.
Thus , we can say that Planck's constant relates the Joules of energy absorbed/released by matter to the observed wavelength of light.
b. transition metals
c. inner transition metals
d. groups 1A and 2A
Answer : The correct option is, (a) Groups 3A through 8A
Explanation :
The general electronic configurations of :
Group 1A :
Group 2A :
Group 3A :
Group 4A :
Group 5A :
Group 6A :
Group 7A :
Group 8A :
Transition metal :
Inner transition metal (Lanthanoids) :
Inner transition metal (Actinoids) :
From the general electronic configurations, we conclude that the groups 3A through groups 8A elements that are characterized by the filling of p-orbitals.
Elements that are characterized by the filling of p orbitals are classified as .
Further Explanation:
In order to make the study of numerous elements easier, these elements are arranged in a tabular form in increasing order of their atomic numbers. Such a tabular representation of elements is called a periodic table. Horizontal rows are called periods and vertical columns are called groups. A periodic table has 18 groups and 7 periods.
a. Groups 3A through 8A
The elements from group 3A to 8A has the general outermost electronic configuration of . So the added electrons are to be filled in p orbitals.
b. Transition metals
These metals have the general valence configuration of . This indicates that the added electrons enter either s or d orbitals.
c. Inner transition metals
These are classified as lanthanoids and actinoids. The general outermost configuration of lanthanoids is while that of actinoids is . In both cases, the added electron enters either d or f orbitals.
d. Groups 1A and 2A
The elements of group 1A have the general valence electronic configuration of . It implies the last or valence electron enters in the s orbital. The group 2A elements have a general configuration of . Here also the last electron enters the s orbital.
So elements from groups 3A to 8A are classified by the filling of p orbitals and therefore option a is correct.
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: periodic table, configuration, ns1, ns2, d, p, f, 3A, 8A, transition metals, inner transition metals, lanthanoids, actinoids, orbitals, 1A, 2A.
Answer:
The answer to your question is: 1, 2, 1, 2
Explanation:
1 Fe(s) + 2 Na⁺(aq) → 1 Fe²⁺(aq) + 2 Na(s)
Fe⁰ - 2e⁻ ⇒ Fe⁺² Oxidases
Na⁺ + 1 e⁻ ⇒ Na⁰ Reduces
1 x ( 1 Fe⁰ ⇒ 1 Fe⁺²) Interchange number of
2 x ( 2Na⁺ ⇒ 2 Na⁰ ) electrons
To balance the oxidation-reduction reaction Fe(s) + Na+(aq) → Fe2+(aq) + Na(s), follow these steps: balance atoms other than hydrogen and oxygen, balance hydrogen atoms, balance oxygen atoms, verify charges
To balance the oxidation-reduction reaction Fe(s) + Na+(aq) → Fe2+(aq) + Na(s), we need to balance the number of atoms for each element and the total charge on both sides of the reaction. Here's the step-by-step process:
So, the balanced oxidation-reduction reaction is: Fe(s) + 2Na+(aq) → 2Fe2+(aq) + Na(s).
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