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4 years ago

Which statement is TRUE

Chemistry

2 answers:

WITCHER [35]4 years ago

7 0

The fourth statement is true..........

Blizzard [7]4 years ago

3 0

In a parallel circuit, if one bulb goes out, all of the bulbs go out .

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Abbreviation for mole

Sedbober [7]

Answer:

Maybe mol

Explanation:

6 0

3 years ago

What could be the fourth quantum number of a 1s^2 electron be?

Bumek [7]

The forth quantum number is Spin quantum number and the value of Spin Quantum Number of 1s² will be +1/2. Therefore, the correct option is (B) option

<h3>What is Spin Quantum Number ?</h3>

It describes the orientation of the electron spin (rotation) in space.

In the given case of 1s² configuration,

since, the Quantum numbers are known as:

Principal quantum number (n) which cannot be zero.

The allowed values of n are therefore 1, 2, 3, 4, and so on.

Angular quantum number (l) is able to be any integer between 0

and n-1.

Therefore, for example, If n = 1, l will be 0,

If n = 2, l can be either 0 or 1.

Magnetic quantum number (m) is able to be any integer between -l and +l.

Therefore, for example, If l = 3, m can be either -3 to +3.

Spin Quantum Number (ms): Ms = +½ or -½ accounts for the orientation of the spin axis of an electron as it is able to spin in only one of two directions.

Thus, since the fourth quantum number is Ms, spin, we infer that the answer is (B) option ie, Ms = +1/2 because it represents the positive spin on 1s².

Learn more about Quantum Number Here ;

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#SPJ1

6 0

2 years ago

PLEASE HELP ME WITH THIS ONE QUESTION!!

Ksenya-84 [330]

2 I think not 100% tho

5 0

3 years ago

Is Newton's statement a law or a theory? It is a theory because it developed and changed over time as new technology provided ne

nika2105 [10]

Answer:

It is a law because it is a statement of fact that does not need any more experimental support.

Explanation:

A hypothesis is an acceptable assumption that is formulated through the collection of information and data and that attempts to explain some phenomenon. In other words, a hypothesis is a conjecture with which one tries to explain an observed fact. The formulation of a hypothesis can be derived in two different ways: by generalization, from a certain number of cases or observed phenomena; and, by analogies observed in the occurrence of different phenomena.

A theory is something that attempts to explain some phenomenon and that is accepted as true by the scientific community. In other words, a theory is a set of rules that describe the behavior of a particular system.

A law is a statement that expresses the constant relationships between phenomena of nature, society or the mind. Scientific law can be defined as an invariable relationship of terms. In other words, a law is what is scientifically proven to be true, it is universally applicable.

So scientific theories and scientific laws are based on hypotheses. But a theory is the explanation of an observed phenomenon, while a scientific law is the description of an observed phenomenon.

The movements of bodies in space are governed by Newton's Laws. These are laws why they are demonstrated by mathematical formulas and Universal application.

Then, the correct option is <u><em>"It is a law because it is a statement of fact that does not need any more experimental support."</em></u>

5 0

4 years ago

Out of 500 silicon atoms: 460 are si-28, which has a mass of 27.98 amu 25 are si-29, which has a mass of 28.98 amu and 15 are si

liberstina [14]

Answer;

=28.09 amu

Explanation;

In this problem, they did not give us the percentages. However, since we know the number of atoms, we can easily calculate the percentages. For example:

(460 X 100)/500 = 92%

If we do this for all three isotopes,

(460 × 25)/500 = 5 %

(460 × 15) /500 = 3%

-We get 92%, 5%, and 3%. (We'll assume these are absolute numbers for determining our significant figures).

Now the problem is just like the previous one. First convert the percentages into decimals. Then multiply those decimals by the masses and add. Here's the solution:

= (0.92) X (27.98 amu) + (0.05) X (28.98 amu) + (0.03) X (29.97 amu)

= 25.74 amu + 1.449 amu + 0.8991 amu

= 28.09 amu

6 0

3 years ago

Read 2 more answers