Measuring how quickly a reactant disappears is one way to measure the ______________of the reaction

Answers

Answer 1

Answer:

Explanation:

More quickly a reactant will disappear, the more quickly it will result in the formation of products. This means that consumption or disappearance of reactants determines the rate of a reaction because only then products will be formed.

Thus, we can conclude that measuring how quickly a reactant disappears is one way to measure the rate of the reaction.

Answer 2

Answer:

Measuring how quickly a reactant disappears is one way to measure the rate of the reaction. It is because the rate of reaction for product formation and reactants forming is the same. It came to a point where their reaction attains equilibrium.

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Which action of President Thomas Jefferson wasin conflict with his belief in a strict interpretation of the Constitution? (1) protesting the impressment of United States sailors (2) purchasing the Louisiana Territory from France (3) pardoning violators of the Alien and Sedition Acts (4) using the United States Navy to subdue the Barbary pirates

3 In the wave-mechanical model of the atom, an orbital is defined as(1) a region of the most probable proton location
(2) a region of the most probable electron location
(3) a circular path traveled by a proton around the nucleus
(4) a circular path traveled by an electron around the nucleus

Answers

(2) a region of the most probably electron location. The rest are all false. (1) and (3) are false obviously, because it denotes the location for the proton, which is in the nucleus, and protons don't travel around the nucleus, they are the nucleus, at least a part of it. (4) a circular path traveled by an electron around the nucleus is false because although there are s orbitals which have a spherical shape around the nucleus in its electron shell, it does not mean it travels circularly around the nucleus, nor does it mean it is the only type of orbital shape.

In wave mechanical model an orbital is defined as $\boxed{\left( {\text{2}} \right){\text{region of most probable electron location}}}{\text{.}}$

Further explanation:

Bohr's model could not account for duality of matter and also contradicted the Heisenberg uncertainty principle. To overcome these weaknesses, a wave mechanical model was developed. The basis of this model was the Schrodinger wave equation of hydrogen atom.

The salient features of the wave mechanical or quantum mechanical model are as follows:

A. The energy associated with electrons present in atoms can take only certain discrete values. This is known as the quantization of energy.

B. Such quantized energy levels are a consequence of wave characteristics of electrons and allowed values are dictated in accordance with the solutions obtained from the Schrödinger wave equation.

C. The exact position as well the velocity of an electron cannot be precisely determined as it obeys the Heisenberg’s uncertainty principle. This leads to an important concept that path of an electron can never be precisely defined. Therefore it is better to use the term probability of locating electron.

D. The region of space around the atom in which the probability of locating any electron is highest is known as the orbital. The physical significance of the orbital is that it can be described using the values of ${\psi }}$ . There are several possible values of ${\psi }}$ . as can be obtained from the solving of Schrodinger equation. So there are several numbers of orbitals associated with an electron.

E. The utility of ${\psi }}$ is that its square ${\left| {\mathbf{\psi }} \right|^{\mathbf{2}}}$ is directly proportional to the probability of locating an electron at a point within an atom. Hence the orbital is not a circular region of space but a region where the probability of locating an electron is highest.

Therefore, in the wave-mechanical model of the atom, a region of the most probable location is defined as orbital. Hence, the correct option is $\left( {\text{2}} \right)$ .

Learn more:

1. Calculation of volume of gas: brainly.com/question/3636135

2. Determine how many moles of water produce: brainly.com/question/1405182

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Bohr theory and quantum chemistry

Keywords: Wave mechanical model, Bohr model, wave mechanical model, Heisenberg’s uncertainty principle, Physical significance, orbital, Schrödinger wave equation and probability

In the flame test, barium ions produce a green flame whereas calcium ions produce a red flame. In your own words, explain these observations in terms of the electron structure of these two ions. In other words explain how these different colors are produced and why using your understanding of atomic structure.

Answers

Answer:

The Barium flame is green because it is a difficult flame to excite, therefore for it to trigger a flame it is necessary that it be too excited for it to occur.

The reddish color of calcium is due to its high volatility and it is sometimes very difficult to differentiate it from strontium.the compression of these elements is due to being able to make them work during combustion

Explanation:

The flame test is a widely used qualitative analysis method to identify the presence of a certain chemical element in a sample. To carry it out you must have a gas burner. Usually a Bunsen burner, since the temperature of the flame is high enough to carry out the experience (a wick burner with an alcohol tank is not useful). The flame temperature of the Bunsen burner must first be adjusted until it is no longer yellowish and has a bluish hue to the body of the flame and a colorless envelope. Then the tip of a clean platinum or nichrome rod (an alloy of nickel and chromium), or failing that of glass, is impregnated with a small amount of the substance to be analyzed and, subsequently, the rod is introduced into the flame, trying to locate the tip in the least colored part of the flame.

The electrons in these will jump to higher levels from the lower levels and immediately (the time that an electron can be in higher levels is of the order of nanoseconds), they will emit energy in all directions in the form of electromagnetic radiation (light) of frequencies characteristics. This is what is called an atomic emission spectrum.

At a macroscopic level, it is observed that the sample, when heated in the flame, will provide a characteristic color to it. For example, if the tip of a rod is impregnated with a drop of Ca2 + solution (the previous notation indicates that it is the calcium ion, that is, the calcium atom that has lost two electrons), the color observed is brick red .

Answer:

The different colours produced come from the different wavelength of the spectrum of light as the excited electrons in the metals return to their original state on cooling down.

Explanation:

The flame test is an analytical procedure used to identify different metals by passing them through a flame.

The flame, which is a source of heat energy heats up the metals and excites their outermost electrons which transit to the next energy level. On cooling down, as the excited electrons return to their original state, they emit different colours corresponding to the spectrum of light. Electrons of larger atoms like Barium emit light of higher frequency and lower wavelength and hence exhibits colours closer to the ultraviolet part of the electromagnetic spectrum while smaller atoms like Calcium emit light of lower frequency and higher wavelength and emit light closer to the infrared part of the spectrum

Baruim (atomic number 56) and Calcium (atomic number 20) are both metals in group two of the periodic table.

They both have two electrons in their outermost shell and are represented by Ba²⁺ and Ca²⁺.

When both metals are passed to through the flame test, the two outermost electrons in both metals are excited.

However because the outermost electrons in Barium are farther to the nucleus than those in Calcium, it takes a lesser amount of heat energy to excite them than that of Calcium which is closer to the nucleus.

The spectrum of light which is usually represented by 'ROYGBIV' has the following colours : Red, Orange,Yellow, Green, Indigo and Violet with Red having their highest wavelength (or shortest frequency) and Violet the shortest wavelength (or highest frequency).

Barium's green colour is because it outermost electrons emit light in the range of the Green spectrum of light and calcium's red colour is because its outermost electrons emit light in the range of the Red spectrum of light

What is it called when elements combine to form a chemical compound?

Answers

Explanation:

A compound is a unique substance that forms when two or more elements combine chemically.
Compounds form as a result of chemical reactions. The elements in compounds are held together by chemical bonds.
A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons.

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What is the total number of joules released when a 5.00-gram sample of water changes from liquid to solid at 0°C?(1) 334 J (3) 2260 J
(2) 1670 J (4) 11 300 J

Answers

Energy released from changing the phase of a substance from the liquid phase to solid phase can be calculated by using the specific latent heat of fusion. The heat of fusion of water at 0 degrees Celsius is 334 J/g. Calculation are as follows:

Energy = 5 grams x 334 J/g
Energy = 1670 J

Answer:

It’s 2)

Explanation:

Who discovered the nucleus by bombarding gold foil with positively charged particles and noting that some particales were widely deflected?

Answers

Rutherford !

The so-called Rutherford experience consisted mainly of launch, against a gold plate, with a beam of particles emitted by a radioactive source. These particles whose electric charge is positive are known as alpha particles.

hope this helps!

Which of the following combinations would result in the largest attractionbetween particles?
Large charges close together
Small charges close together
Large charges far apart from each other
OSmall charges far apart from each other

Answers

Answer:

Explanation:

Large charges close together maybe

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