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3 years ago

Lightning is a very large flow of electrical energy. Describe the type of energy that creates the electrical energy.

2 answers:

8 0

the answer is D) The electrical energy comes from the attraction between charges in the cloud and the ground creating an electric potential.

Katarina [22]3 years ago

4 0

D..........................................

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Fill in the blank for these q’s

kolezko [41]

Plant cells are rectangular or squarish in shape.

Plant cells have a large vacuole.

7 0

3 years ago

Read 2 more answers

23. The cell has a

andrew11 [14]

Then that would be 100% all together I believe

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1 year ago

Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysi

Ipatiy [6.2K]

Answer:

The molecular formula of estradiol is: $C_{18}H_{24}O_2$ .

Explanation:

Molar mass of of estradiol = M= 272.37 g/mol

Let the molecular formula of estradiol be $C_xH_yO_z$

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

Percentage of carbon in estradiol :

$\frac{x\times 12 g/mol}{272.37 g/mol}\times 100=79.37\%$

x = 18.0

Percentage of hydrogen in estradiol :

$\frac{y\times 1g/mol}{272.37 g/mol}\times 100=8.88\%$

y = 24.2 ≈ 24

Percentage of oxygen in estradiol :

$\frac{z\times 16 g/mol}{272.37 g/mol}\times 100=11.75\%$

z = 2

The molecular formula of estradiol is: $C_xH_yO_z:C_{18}H_{24}O_2$

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3 years ago

The attractions that allow molecules of krypton to exist in the solid phase are due to:

OLga [1]

Answer:

4) Van der waals forces

Explanation:

Krypton (Kr) belongs to the noble gas group and has fully filled valence orbitals. In the solid phase, Kr exists as a white solid with a face centered cubic structure.

Intermolecular forces of attraction from the strongest to the weakest include:

Ionic > hydrogen bonding > dipole-dipole > london dispersion

Kr is monoatomic and non-polar. When fully filled (stable) valence orbitals of 2 Kr atoms approach each other in close proximity they experience a repulsive force which prevents the formation of strong bonds. Thus, the only force of attraction in Kr is the long range weak Van Der Waals force also known as the london dispersion force.

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3 years ago

What is the definition of a chemical bond?

sweet-ann [11.9K]

Answer:

B- A mutual attraction between the nuclei and the electrons in two different atoms

4 0

3 years ago