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3 years ago

1. When frequency increases energy:

1 answer:

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B

When frequency increases, as does the energy, but wavelength decreases. It also works vise versa; if wavelength were to increase, its frequency and energy will decrease.

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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

1. Circle the letter of each sentence that is true about water's structure. a. Water is made up of atoms bonded to form molecule

sukhopar [10]

Water is made up of atoms bonded to form molecules, the chemical formula for water is H20, and 1 side has a positive charge, while the other has a negative one.

<h3>What is water?</h3>

Water is a fundamental molecule for life on the Earth due to its physico-chemical properties.

The water formula is H2O, which means that this molecule is composed of two atoms of Hydrogen and one atom of Oxygen.

In conclusion, Water is made up of atoms bonded to form molecules, the chemical formula for water is H20, and 1 side has a positive charge, while the other has a negative one.

Learn more on water properties here:

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2 years ago

What is the main difference between physical properties and chemical properties

Bogdan [553]

Physical looks at appearance e.g if its solid
chemical is more of what it contains and how it reacts e.g metals

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3 years ago

Read 2 more answers

How does a scientific theory compare to a scientific law?

Alisiya [41]

Answer:

Explanation:

Scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept.

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3 years ago

How do i caculate velocity

Dimas [21]

Answer:

Velocity Equation in these calculations:

Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v.

Explanation:

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3 years ago