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lapo4ka [179]
2 years ago
11

A solution is diluted by adding more _____, which means the _____ of the solution increases but the amount (moles) of solute sta

ys the same.
Chemistry
1 answer:
Rudik [331]2 years ago
6 0

Answer:solvent ; volume

Explanation:

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What two positions would the moon be when we have the lowest tidal range?
Shkiper50 [21]

Answer:

Quarter and half moons

Explanation:

7 0
3 years ago
In the animation, you can see that the electrons occupy different orbitals according to the energy level of each orbital. A sing
lara31 [8.8K]

B) The He atom has two electrons that have parallel spin in its 1s orbital.

C) Electrons generally occupy the lowest energy orbital first.

D) The arrangement of the orbitals is the same in a multielectron atom and a single-electron atom

E) The C atom has two unpaired electrons.

Explanation:

In writing sublevel notations certain rules are followed:

  • The maximum number of electrons in the orbitals of sublevels are:

             two for s-sublevel with one orbital

             six for p-sublevel with three orbitals

             ten for d-sublevel with five orbitals

             fourteen for f-sublevel with seven orbitals

  • Aufbau's principle states that sublevels with lower energies are filled before those with higher energies.

                    1s 2s 2p 3s 3p 4s 3d 4p 5s    increasing order of filling

  • Pauli exclusion principle states that no two electrons can have the same set of the four quantum numbers i.e electrons in the same orbital cannot spin in the same direction.
  • Hund's rule states that electrons go into degenerate orbitals singly first before pairing up.

Based on these principles and the animation, the following options are correct:

B) The He atom has two electrons that have parallel spin in its 1s orbital.

Helium has two electrons in the 1s orbital. From Pauli's exclusion principle, we see that the two electrons cannot spin in the same way. Therefore, they have parallel spin

C) Electrons generally occupy the lowest energy orbital first.

From Aufbau's principle, electrons go into orbitals with lower energies first before those with higher energies.

D) The arrangement of the orbitals is the same in a multi-electron atom and a single-electron atom

                  1s 2s 2p 3s 3p 4s 3d 4p 5s

Orbitals are arranged in the order of their energies from the lowest to the highest.

E) The C atom has two unpaired electrons.

Configuration for carbon atom is shown below:

                            1s² 2s² 2p²

Learn more:

Orbitals brainly.com/question/1832385

#learnwithBrainly

8 0
3 years ago
Read 2 more answers
Resistance is the slowing of the flow of electrons and where some of the electrical energy is converted into heat.  true or fals
zaharov [31]

Answer: True

Explanation:

I just took the test and got it right

3 0
3 years ago
If 60g of rust (Fe2O₁) are made in the reaction below, how many Liters of oxygen must be used?
Aleksandr [31]

Answer:

18.

Explanation:

1) according to the reaction (M(Fe)=56; M(O₂)=32; V₀=22.4):

4Fe+3O₂⇒2Fe₂O₃; - ν(O₂)=0.75*ν(Fe);

2) ν(Fe)=m(Fe)/M(Fe)=60/56≈1.071 [mol];

3) ν(O₂)=0.75*1.071=0.804 [mol];

4) V(O₂)=V₀*ν(O₂); ⇒ V(O₂)=22.4*0.804=18 [lit].

7 0
1 year ago
For the chemical reaction
kakasveta [241]

Answer:

Mass = 199.21 g

Explanation:

Given data:

Moles of HCl = 3.59 mol

Mass of CaCl₂ = ?

Solution:

Chemical equation:

2HCl + Ca(OH)₂  →     CaCl₂ + 2H₂O

we will compare the moles of HCl with  CaCl₂ from balanced chemical equation:

                HCl             :           CaCl₂

                   2              :              1

                 3.59           :             1/2×3.59 = 1.795  

3.59 moles of HCl will produced 1.795 moles of CaCl₂.

Mass of CaCl₂.

Mass = number of moles × molar mass

Mass = 1.795 mol  × 110.98 g/mol

Mass = 199.21 g

3 0
3 years ago
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