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Degger [83]
3 years ago
9

CaCO3 is an example of which type of material?

Chemistry
2 answers:
antoniya [11.8K]3 years ago
6 0
Its element think hope it helps 
ladessa [460]3 years ago
4 0
The correct answer is C. Compound.

Calcium carbonate<span> is a </span>chemical compound<span> with the </span>formula CaCO3<span>. It is a common substance found in </span>rocks<span> as the </span>minerals calcite<span> and </span>aragonite<span> (most notably as </span>limestone<span>, which contains both of those minerals) and is the main component of </span>pearls<span> and the </span>shells of marine organisms<span>, </span>snails<span>, and eggs. Calcium carbonate is the active ingredient in </span>agricultural lime<span> and is created when calcium ions in </span>hard water<span> react with </span>carbonate ions<span> to create </span>limescale<span>. It is medicinally used as a </span>calcium<span> supplement or as an </span>antacid<span>, but excessive consumption can be hazardous.</span>
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What are two properties of liquids, solids, gases and matter. What are two important things about them.
larisa86 [58]
Solids— have tightly packed molecules, structured shape

Liquid— have no definite shape and the molecules are not tightly packed like a solid, they are a lot more loose.

Gas— No structure at all, molecules are free flowing

Sorry I couldn’t be a better help.. but I hope this gives you a bit of an idea :)
4 0
4 years ago
A lab technician mixed a 550 ml solution of water and alcohol. if​ 3% of the solution is​ alcohol, how many milliliters of alcoh
kupik [55]

The solution 550 ml total and first we will find the amount of alcohol. 3% = 0.03 550 ml x .03 = 16.5 ml alcohol
 Then to find the amount of water used, we just have to subtract the amount of alcohol from the total volume  
550 ml total - 16.5 ml alcohol = 533.5 ml water
5 0
4 years ago
What is the mass number of an ion with 107 electrons, 158 neutrons, and a 1 charge?
vredina [299]
No of protons=107+1=108
No. Of neutrons=158
Mass no. =166
6 0
4 years ago
Why would it be important for a scientist to understand HOW an element would react with another element?
Eddi Din [679]
Sounds good, but would do little to explain why lithium, with 3 electrons, is more reactive than Helium with 2,  or why Caesium is more reactive than Sodium, although it clearly has far more electrons with which to shield its nucleus.

Hydrogen is unusual in having a fairly exposed nucleus, but chemistry is not very much about the nucleus, it is about the way the electrons themselves interact.  As Lightarrow suggests, it does help if you know the quantum behaviour of electrons in an atom (which I do not claim to know), but it basically boils down to electrons preferring some configurations over others.

At the simplest, the comparison between hydrogen and helium – it is not really to do with the nucleus, it is more to do with electrons liking to be in pairs.  Electrons have (like most common particles) two possible spin states, and they are more stable when an electron in one spin state is paired with an electron in the opposite spin state.  When two hydrogen atoms meet, the electrons each one of them hold can be shared between them, forming a more stable pair of electrons, and thus binding the two atoms together.

All of the group 1 atoms (hydrogen, lithium, sodium, potassium, caesium; all share the characteristic that they have an odd number of electrons, and that one of those electrons is relatively unstable.  The reason that the heavier atoms are more reactive is quite contrary to the argument that Lightarrow put forward – it is not because of a stronger electrical reaction with the nucleus, but because of the larger number of electrons in the bigger atoms, they are actually more weakly attached to their own nucleus, and so more readily interact with the electrons of other atoms.

Another, even more stable configuration for the electrons around an atom requires 8 electrons.  This gives the noble gases (apart from Helium) their stability, but it also gives atoms like chlorine and fluorine their reactivity.  Atoms like those of chlorine and fluorine are only one electron short of having a group 8 electrons available to them, and so will readily snatch an electron from another atom (particularly if it is an atom that has a single loose electron, such as sodium or caesium) in order to make up that group of 8 electrons.

The above explanation is very crude, and really does need a proper understanding of the quantum states of electrons to give a better quantitative answer (it is probably the kind of answer that might have been acceptable in the 1920s or 1930s – the Bohr orbital model of the atom, but has now been superseded by better explanations of what goes on amongst the electrons of an atom).



3 0
3 years ago
Read 2 more answers
What is heat capacity and how does it relate to how quickly a substance heats up or cools<br> down?
Lorico [155]

Answer:

heat capacity: "the number of heat units needed to raise the temperature of a body by one degree."

Explanation:

4 0
3 years ago
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