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Need help fast!!!!!!!!!!! - 1

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Answer 1
Answer: I think it’s the second one!! Hope this helps! BRANLIEST plzzzz

Related Questions

Can anyone please help me with this????Please help me.
The orderly geometric arrangement of atoms is called a crystalline solid. a. Trueb. False
Write the atomic symbols for isotopes with the following characteristics? 1)an oxygen atom with 10 neutrons 2)a neon atom with twelve neutrons 3)25 electrons and 28 neutrons 4)a mass number of 24 and 13 neutrons 5)a titanium atom with 25 neutrons
What point were the authors of the Declaration trying to make in the Preamble?HELP.
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3 ( s ) + 2 HCl ( aq ) ⟶ CaCl2 ( aq ) + H 2 O ( l ) + CO 2 ( g ) How many grams of calcium chloride will be produced when 30.0 g of calcium carbonate is combined with 10.0 g of hydrochloric acid

To show the electron configuration for an atom, what is the advantage of using an orbital notation compared to a dot structure? Orbital notation takes up less space. Orbital notation shows the spin of the electrons. Orbital notation makes it easier to count the electrons. Orbital notation shows the electron distribution in shells.

Answers

Correct answer: Option B i.e. Orbital notation shows the spin of the electrons.

Reason
Dot diagram provides only the electrons that are present in valance shell. Furthermore, it provides no information about the electron spin. On other hand, 
orbital notation is writing taking into consideration aufbau principle, Hund's rule and Pauli's exclusion principle. Hence, it provides correct description of electron distribution of electrons in atoms. Furthermore, orbital notation shows the spin of the electrons. 

Answer: The correct answer is Orbital notation shows the spin of the electrons.

Explanation:

Advantages of Orbital notation :

  • One can easily count total numbers of electron in an atom
  • It conveys the distribution of electrons in the shells.
  • It also tells us about the spin of the electrons.

Where as spin of the electrons is not conveyed by the electron dot structure.

Hence, the corrects answer is : Orbital notation shows the spin of the electrons.

Evaluate these two sound waves and determine what property they have In common

Answers

Answer:

The same wavelength

Explanation:

The two sound waves shown in the diagram has the same wavelength as clearly shown.

  • Wavelength of a wave is the distance between a complete wave cycle.
  • It is the difference between successive train of troughs and crests.
  • In the figure shown the amplitude, vertical displacement of the wave differs.
  • But the wavelength of the waves are the same.

The atomic weight of an unknown element, in atomic units (amu), is approximately 20% less than that of calcium, the atomic weight of calcium is 40 amu. Which of the following best approximates the atomic weight, in amu, of the unknown element? (a) 8 (b) 20 (c) 32 (d) 48

Answers

a) 8

40*20%

=40*20/100

=800/100

=8

Final answer:

The atomic weight of the unknown element, which is approximately 20% less than calcium (40 amu), is estimated to be 32 amu.

Explanation:

The atomic weight of an unknown element is said to be approximately 20% less than that of calcium, which has an atomic weight of 40 atomic mass units (amu). To calculate the approximate atomic weight of the unknown element, take 20% of 40 (which is 8) and subtract it from 40. The result is 32 amu (40 - 8 = 32), so the correct answer is (c) 32.

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Is a White Dwarf a star? yes or no

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Answer: Yes.

Explanation:

     A white dwarf is the last "stage" for low- and medium-mass stars, it is what stars become after they have exhausted their fuel. They are verydense stars as they are the remaining core of stars. They're typically the size of a regular planet. White dwarves are not the type of stars we usually think of, but they are still stars.

The normal boiling point corresponds to the temperature at which both the liquid and gas are under the standard atmospheric pressure of 1 atm.TRUE

FALSE

Answers

TRUE. (Lorenzo Romano Amadeo Carlo Avogadro) Ideal Gas Law that defined as one in which all collisions between atoms or molecules are perfectly elastic in which there are no intermolecular attractive forces.  In such a gas, all the internal energy is the form of kinetic energy and any change in internal energy is accompanied by a change in temperature. That characterized by three state variables: absolute pressure (P) = 1 atm, volume (V) = 22.4 L and absolute temperature (T) = 273 K.

A catalyst is added to a system at equilibrium. If the temperature remains constant, the activation energy of the forward reaction(1) decreases(2) increases(3) remains the same

Answers

When a catalyst is added to a system the equilibrium concentration remains unchanged. A catalyst increases the activation energy of the forward reaction. The correct option is 2.

What is a catalyst?

A substance which increases the rate of a reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is known as the catalysis. It is believed that a catalyst usually participates in the chemical reaction and it speeds up.

In short, the catalyst lowers the energy barrier and thereby provides a different path of lower activation energy for the reaction so that the rate of the reaction increases.

A catalyst speeds up both the forward and backward reactions to the same extent and does not alter equilibrium constant. Thus it speeds up the attainment of equilibrium faster.

Thus the correct option is 2.

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The catalyst would increase the rate of the forward reaction...

And increase the rate of the backward to the same extent thus not affecting equilibrium.