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harkovskaia [24]
3 years ago
12

Scientists classify rocks into three different types. What is the main basis for the classification system they chose?

Chemistry
2 answers:
umka21 [38]3 years ago
7 0

Answer:

The main basis for the classification system is the way rocks were formed. With these criteria there are three different types of rocks:

  • Igneous rocks :  formed through the cooling and solidification of magma or lava
  • Sedimentary rocks : formed by the accumulation or deposition of small particles
  • Metamorphic rocks: formed by the transformation of existing rock types by heating and pressure
charle [14.2K]3 years ago
5 0
1. color of the rock
2. shape of the rock
3. how the rock is formed
4. who discovered the rock
that is it
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Particle quantity/number of Cu(NO3)2
Murrr4er [49]

Answer:

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Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO_3)
nadya68 [22]

Answer:

CaCO₃(s) → CaO(s) + CO₂(g)

Explanation:

The decomposition reaction always make two compounds from one.

The products always have simpler chemical structure, originated from a determined compound. This can happens  spontaneously or by a third party.

A notable example of decomposition is hydrolysis. As for example the case of water, which decomposes and generates oxygen and hydrogen gas

2H₂O (l) → 2 H₂ (g) + O₂ (g)

In this case, the calium carbonate decomposes into CaO and CO₂

These two, are the products of the decomposition.

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6 0
3 years ago
Read 2 more answers
the red line observed in the line spectrum for hydrogen has 3.03x10^-19J, what is the wavelength, in nm, of this?
djverab [1.8K]

Answer:

λ = 6.5604 x 1016 nm

Explanation:

Given Data:

The energy of the red line in Hydrogen Spectra = 3.03 x 10-19

Formula to calculate Wave length

E= hv

Where E is Energy

h is Planks Constant = 6.626 x 10–34 J s

v is frequency

In turn

v= c/ λ

where c is speed of light = 3.00 x 108 m s–1

λ is wavelength = to find

Solution:

Formula to be Used:

E= hv………………………… (1)

Putting the value v in equation 1

               E= h c/ λ…………………… (2)

Put the value in equation 2

3.03 x 10-19 J  = (6.626 x 10–34 J s) x (3.00 x 108 m s–1) / λ ……………………….(3)

By rearranging equation 3

λ = (6.626 x 10–34 J s) x (3.00 x 108 m s–1) /3.03 x 10-19  J

λ = 6.5604 x 107 m

The answer is in “m”

So we have to convert it into nm

So for this to convert “m” to “nm” multiply the answer with 109

λ = 6.5604 x 107 x 109

λ = 6.5604 x 1016 nm

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Whats the complete chemical symbol for the ion that has : 13 neutrons 11 protons , and 9 electrons.
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The answer gonna be Na2+
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