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3 years ago

When you look at a molecule, what do the individual spheres represent?

Chemistry

1 answer:

Mariana [72]3 years ago

6 0

Answer:

The correct option is A) individual atoms

Explanation:

In science, the structure of a molecule is often drawn in the form of spheres. Each sphere shows an individual atom. For example, consider a molecule of H2. It will be drawn as two spheres, each sphere representing a single hydrogen atom. Two spheres will combine to form the H2 molecule. However, the size of the spheres will be equal as the same elements atoms or elements join to form a molecule.

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A gas with a volume of 4.0L at a pressure of 205kPa is allowed to expand to a volume of 12.0L. What is the pressure in the conta

mr Goodwill [35]

Answer:

68.3 kilo Pascal is the pressure in the container.

Explanation:

To calculate the new pressure , we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.

The equation given by this law is:

$P_1V_1=P_2V_2$

where,

$P_1\text{ and }V_1$ are initial pressure and volume.

$P_2\text{ and }V_2$ are final pressure and volume.

We are given:

$P_1=205kPa\\V_1=4.0 L\\P_2=?\\V_2=12.0 L$

Putting values in above equation, we get:

$P_2=\frac{P_1V_1}{V_2}$

$=\frac{205 kPa\times 4.0 L}{12.0 L}=68.3 kPa$

68.3 kilo Pascal is the pressure in the container.

5 0

3 years ago

Calculate the number of total atoms in 195 grams of Ni(OH)2.

Anni [7]

1.267 x 10 ^ 24 is the total number of atoms

6 0

3 years ago

Explain percent ionic character of a bond. Explain percent ionic character of a bond. Percent ionic character is defined as the

disa [49]

Answer:

Percent ionic character is defined as the ratio of a bond’s actual dipole moment to the dipole moment it would have if the electron were completely transferred from one atom to the other, multiplied by 100

Explanation:

The percent ionic character seeks to establish the amount of electrovalency in a particular compound. It simply compares the covalency i.e extent of shared electrons to the the electrons that are transferred.

It is given as the ratio of the acutal dipole moment to the dipole moment due to ionic character of the bond multiplied by 100:

Percent ionic character = μ_obs/μ_ionic x 100

Where μobs is the actual dipole moment and μ ionic is the dipole moment if the bonds were 100% ionic.

6 0

3 years ago

What are the classifications of these compounds? Are they triglycerides?

Gala2k [10]

Answer:

Yes they are triglycerides

Explanation:

Triglycerides are esters derived from glycerol and three fatty acids.

If we look at the structures closely, we will notice that the compounds are composed of glycerol and three fatty acids.

Hence the structures are triglycerides. The first structure is an unsaturated triglyceride while the second structure is a saturated triglyceride.

6 0

3 years ago

An element Y has 13 protons . with reference on Y answer these questions •

kobusy [5.1K]

Explanation:

Y has 13 protons and we know that Aluminium (Al) too has 13 protons.

So , element Y = Aluminium

• In an element , no. of protons = no. of electrons. So , Y has 13 electrons.

• Mass no. of Y (Aluminium) = 27.

• Also we know that ,

Mass number = no. of protons + no. of neutrons

So,

No. of neutrons = 27 - 13 = 14

• Valence electrons are the electrons which are present in the outermost shell of an element.

Electronic Configuration of Y = 2,8,3

So, Y has 3 valence electrons.

• We know that Y is Aluminium & Aluminium is a metal. So , Y is a metal.

• Valency of Y = +3

7 0

3 years ago