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padilas [110]
3 years ago
15

Cuales son los cambios que siempre envuelven cambios en la compocision de la sustancia?

Chemistry
1 answer:
QveST [7]3 years ago
3 0

I already answered this question in Spanish language. Now I answer in English.


Answer: the chemical changes.


Explanation:


We understand by composition of a substance to the proportion (ratio or percentage) of each element (type of atoms) that makes up the same, as well as the way in which these elements are linked (chemical bonds).


A chemical change is a process, also called a chemical reaction, in which one or more substances are converted into different substances.


The resulting substances are different because their composition is different, since some chemical bonds have been broken and others have been formed, giving rise to a new structure. The chemical formula of each compound product of the chemical change will present a different combination of atoms, in ratio or structure.

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3. Why are nutrients needed for living things? Describe the difference between living and nonliving things.
igor_vitrenko [27]
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8 0
3 years ago
Why does a planet stay in orbit?
I am Lyosha [343]

Answer:

Gravity

Explanation:

A planet is gravitationally pulled around the sun.

6 0
3 years ago
Read 2 more answers
What is the final volume (l) of a 10.0 l system that has the pressure quartered?
mihalych1998 [28]
According to Boyle's Law, P1V1 = P2V2

where P1 and V1 are initial pressure and volume respectively. P2 and V2 are final pressure and volume receptively.

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Answer: Final volume of system is 2.5 l


5 0
3 years ago
Which metal can be extracted from bauxite ore?​
Finger [1]
Aluminum
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8 0
3 years ago
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How many atoms of iodine are in 12.75g of CaI2? Hint. How many Iodines are there in one CaI2 particle?
xenn [34]

Answer:

5.225x10^{22}atoms\ I

Explanation:

Hello!

In this case, since 12.75 g of calcium iodide has the following number of moles (molar mass = 293.89 g/mol):

n_{CaI_2}=12.75gCaI_2*\frac{1molCaI_2}{293.89gCaI_2}=0.0434molCaI_2

In such a way, since 1 mole of calcium iodide contains 2 moles of atoms of iodine, and one mole of atoms of iodine contains 6.022x10²³ atoms (Avogadro's number), we compute the resulting atoms as shown below:

atoms\ I=0.0434molCaI_2*\frac{2molI}{1molCaI_2} *\frac{6.022x10^{23}atoms\ I}{1molI} \\\\atoms\ I = 5.225x10^{22}atoms\ I

Best regards!

4 0
3 years ago
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