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2 years ago

Which statement best describes the rock cycle?

Chemistry

1 answer:

Rom4ik [11]2 years ago

7 0

Answer: Processes that change rocks from one type to another.

Explanation: During the rock cycle, different rock types change from one to another. For example, sedimentary rock changes to metamorphic rock through heat and pressure.

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why is nitrous oxide sedation especially useful for control of soft tissue discomfort during dental hygiene procedure

Stolb23 [73]

Answer:

Because it has a quickly sedative effect and it has antimicrobial effect.

Explanation:

This gas is useful because is used to trait pain, reduce anxiety and promote relaxation, slow down the body reaction, so the dentist can use it to calm down the patients.

If the patient present some injuries, this gas can help in wound healing.

7 0

3 years ago

2. Answer this question: Lava rocks I nature come in different shapes and sizes. What processes do you think are responsible the

GuDViN [60]

Answer: im not sure im only in 8th grade but im pretty sure Erosion i started learning about this last year i really cant explain it... im still hainving trouble with it.

Explanation:

4 0

3 years ago

During the first half of the 20th century, the theory of plate tectonics was developed. Evidence supporting this theory included

Makovka662 [10]

A) GPS monitoring and satellite imagery of crustal movements

Explanation:

The most recent evidence supporting the theory of plate tectonics is the use of GPS monitoring and satellite imagery of crustal movements.

GPS denotes Global Positioning Systems.

Satellite imagery is a recent advancement in the study of moving plates.

The global positioning system uses the position of a system of satellites in space to delineate positions on earth.
It works on the principles of triangulation and this helps to fix positions of objects on the earth surface.
With this, the change in position of the plates can be recorded by known fixed positions of objects.
Satellite imagery helps to map changes in terrain with time.
Images can be correlated through time and the shift in terrains delineated.

learn more:

Wegener brainly.com/question/5002949

#learnwithBrainly

5 0

3 years 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: $C_xH_yO_z:C_{18}H_{24}O_2$

7 0

3 years ago

Why the is ratio of magnesium ions to chloride ions in MgCl2 is 1:2?

Monica [59]

You should read up on Proust's law, better known as the Law of Definite Proportions. This is a chemical law that defines your question more generally, on why the ratio of elements and ions are always fixed.

Basically, this compound Magnesium(II) Chloride is MgCl2 because it has the same number of protons, neutrons, and electrons all the way. This defines the properties of the compound or atom.

5 0

3 years ago