Що таке кислоти? pliz<br>

What can you conclude from the figure shown?

arlik [135]

Answer:

A. Hund's rule has been violated

Explanation:

There must be one electron with the same spin in each orbital of the same energy before you can put two in the same orbital. In the photo, the 2s sublevel is completely filled before the 1s sublevel (if anything the 1s should have an up spin and down spin, with the 2s having one up spin).

6 0

3 years ago

Calculate the molar mass of a 2.89 g gas at 346 ml, a temperature of 28.3 degrees Celsius, and a pressure of 760 mmHg.

malfutka [58]

The molar mass of gas = 206.36 g/mol

<h3>Further explanation</h3>

In general, the gas equation can be written

$\large{\boxed{\bold{PV=nRT}}}$

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.082 l.atm / mol K

T = temperature, Kelvin

mass (m)= 2.89 g

volume(V) = 346 ml = 0.346 L

T = 28.3 C + 273 = 301.3 K

P = 760 mmHg=1 atm

The molar mass (M) :

$\tt PV=\dfrac{m}{M}RT\\\\M=\dfrac{mRT}{PV}\\\\M=\dfrac{2.89\times 0.082\times 301.3}{1\times 0.346}\\\\M=206.36~g/mol$

8 0

3 years ago

If this atom were to form an ion, its charge would be A. 0 B. -1 C. +1 D. +2

Alex Ar [27]

Explanation:

When atoms forms ion, they either lose or gain electrons.

In an atom, we have three subatomic particles;

Protons are the positively charged particles
Electrons are the negatively charged particles
Neutrons carry no charges.

A neutral atom has equal number of protons and electrons.

A positively charged atom has more protons than electrons which implies that they have lost electrons.

A negatively charge atom has more electrons than protons suggesting that they have gained more electrons.

If we are given Na, it will for Na⁺ when it loses the electron in its outermost shell. Hence the number of protons is now more and the atoms is positively charged.

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Anions brainly.com/question/4670413

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7 0

4 years ago

Part a choose the molecule or compound that exhibits dipole-dipole forces as its strongest intermolecular force. Choose the mole

mart [117]

Answer : $SO_{2}$ is the molecule that exhibit dipole-dipole forces as its strongest intermolecular force.

Explanation : The shape or geometry of given molecules of $N_{2}$ , $H_{2}$ , $CBr_{4}$ , $BCl_{3}$ and $SO_{2}$ are linear, linear, tetrahedral, trigonal planar and angular respectively.

The given molecules $N_{2}$ , $H_{2}$ , $CBr_{4}$ , $BCl_{3}$ are symmetrical molecules. These symmetric molecules cannot exists as dipole even they contain polar bonds. Thus, these molecules will not exhibit dipole-dipole forces.

$SO_{2}$ molecule has polar bonds and unsymmetrical bonds as shown in attached image. This molecule cannot exhibit H-bonding. It exhibit only dipole-dipole forces.

Therefore, $SO_{2}$ molecule exhibit dipole-dipole forces as strongest intermolecular force.