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vaieri [72.5K]
3 years ago
8

Is leaving an iron nail outside a chemical or physical change? NEED REASONS!

Chemistry
1 answer:
Paul [167]3 years ago
4 0
Chemical change. You can never get back the rusted layers of metal even though you can wipe off the rust. Chemical changes are irreversible.
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Covalent bonds can occur where atoms share one or more pairs of electrons. Which of the following would form a double covalent b
mojhsa [17]

Answer:

The answer to your question is: CO2

Explanation:

The information given is correct, Covalent bonds occur when atoms share one or more pairs of electrons, but also, covalent bonds occur with nonmetals, then,

a.NaCl     This elements form an ionic bond, so this option is incorrect.

b.Cl2      Here there are two non metals  but the form one single covalent bond, so this option is incorrect.

c.CO2  Carbon dioxide forms 2 double covalent bonds.

d.NH3 ammonium only forms single covalent bonds

6 0
3 years ago
Define the following terms.<br> a. Capillary action<br> b. Chromatogram
jonny [76]

Answer:

<em>1</em><em>.</em><em>Capillary action is important for moving water (and all of the things that are dissolved in it) around. </em>

<em>2</em><em>.</em><em>the pattern formed on an adsorbent medium by the layers of components separated by chromatography. </em>

Explanation:

hope this help you

6 0
3 years ago
How many milliliters are in 22 mm3?
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8 0
3 years ago
Pouring cold water in your hot coffee is<br> conduction<br> convection<br> radiation
Sladkaya [172]
Convection this is because convection is bull movement of molecules between fluids
6 0
3 years ago
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A piece of copper has a volume of 100.0cm^3 (3power) if the mass of the copper is 890g, what is the density of copper??
Bas_tet [7]
Density=mass/volume
Data:
mass=890 g
volume=100 cm³

Density=890 g/100 cm³=8.9 g/cm³

answer: the density of the copper is 8.9 g/cm³
6 0
3 years ago
Read 2 more answers
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