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podryga [215]
4 years ago
6

Using the periodic table, explain the difference between hydrogen, deuterium, and tritium - i.e. hydrogen-1, hydrogen-2, and hyd

rogen-3.
A) Allotropes vary in their number of protons - so they contain 1, 2, and 3 protons, respectively.
B) The atoms deviate in their number of photons - so they contain 1, 2, and 3 photons, respectively.
C) Isotopes differ only in their number of neutrons - so they contain 0, 1, and 2 neutrons, respectively.
D) These configurations diverge in their number of electrons - so they contain 1, 2, and 3 electrons, respectively.
Chemistry
2 answers:
IgorLugansk [536]4 years ago
7 0
C
These are all isotopes of Hydrogen and they differ from one another because of their different number of neutrons.
ArbitrLikvidat [17]4 years ago
4 0

Answer: C) Isotopes differ only in their number of neutrons - so they contain 0, 1, and 2 neutrons, respectively.

Explanation: Isotopes are elements which have same atomic number but different mass number. Hydrogen has three isotopes named as hydrogen _1^1\textrm{H} , deuterium _1^2\textrm{H} , and tritium _1^3\textrm{H}.

Atomic number= number of protons = number of electrons (for neutral atom)

Mass number = number of protons + number of neutrons

Thus Number of neutrons = Mass Number - Atomic number

Thus number of neutrons in hydrogen with atomic number 1 and mass number 1 = 1 - 1 = 0

Thus number of neutrons in deuterium with atomic number 1 and mass number 2 = 2 - 1 = 1

Thus number of neutrons in tritium with atomic number 1 and mass number 3 = 3 - 1 = 2

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Which of the following represents a propagation step in the monochlorination of methylene chloride (CH2Cl2)?a. CHCl3 + Cl. Right
svetlana [45]

Answer:

B = CHCl2 + Cl2 --> CHCl3 + Cl

Explanation:

Free radical halogenation is a chlorination reaction on Alkane hydrocarbons. This involves the splitting of molecules into radicals/ unstable molecules in the presence of sunlight/ U.V light which ensures bonding of the molecules.

Free radical chlorination is divided into 3 steps which are:

The initiation step

The propagation step

The termination step

So in reference to the question, propagation step involves two steps.

The first step is where the molecule in this case the methylene chloride(CH2Cl2) loses a hydrogen atom and then bond with a chlorine atom radical to give a nethylwnw chloride radical and HCl.

The second step involves the reaction of this methylene chloride got in the first step with chlorine molecule to form trichloride methane and a chlorine radical.

You would find in the attachment the 2 step mechanism.

3 0
3 years ago
_____ are keys to reactivity
Elina [12.6K]
Number of electron determine reactivity
5 0
3 years ago
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the listed concentrations, calculate the free energ
Ahat [919]

<u>Answer:</u> The Gibbs free energy of the reaction is 21.32 kJ/mol

<u>Explanation:</u>

The chemical equation follows:

\text{Malate }+NAD^+\rightleftharpoons \text{Oxaloacetate }+NADH

The equation used to Gibbs free energy of the reaction follows:

\Delta G=\Delta G^o+RT\ln K_{eq}

where,

\Delta G = free energy of the reaction

\Delta G^o = standard Gibbs free energy = 29.7 kJ/mol = 29700 J/mol  (Conversion factor: 1 kJ = 1000 J)

R = Gas constant = 8.314J/K mol

T = Temperature = 37^oC=[273+37]K=310K

K_{eq} = Ratio of concentration of products and reactants = \frac{\text{[Oxaloacetate]}[NADH]}{\text{[Malate]}[NAD^+]}

\text{[Oxaloacetate]}=0.130mM

[NADH]=2.0\times 10^2mM

\text{[Malate]}=1.37mM

[NAD^+]=490mM

Putting values in above expression, we get:

\Delta G=29700J/mol+(8.314J/K.mol\times 310K\times \ln (\frac{0.130\times 2.0\times 10^2}{1.37\times 490}))\\\\\Delta G=21320.7J/mol=21.32kJ/mol

Hence, the Gibbs free energy of the reaction is 21.32 kJ/mol

4 0
3 years ago
Why is a solution not a pure substance
Firlakuza [10]
It is not a pure substance, because a solution are mixed chemicals in a way that the molecules are not bonded with one another. Thus, separating them from compounds and elements, which are pure substances.
8 0
3 years ago
Which of the following describes the characteristics of a plasma? (3 points) a Particles are packed closely together, have low c
Jobisdone [24]

Answer:

The correct option is;

b. The particles are positively and negatively charged, have high compressibility, and spread out to fill a container

Explanation:

Plasma are gases that contain positively and negatively charged particles. Therefore, plasma flow drift in space such that plasma. like gases has no characteristic shape or volume but takes the shape and fills the entire volume of a container in which it is placed

Other characteristics of plasma are that plasma is a conductor of electricity and magnetic fields can therefore exist in plasma due to the fact that plasma are made of atoms in which part or all of the electrons have been removed leaving the ions to roam freely in a container.

8 0
3 years ago
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