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krek1111 [17]
3 years ago
13

Which best describes a single atom of an element?

Chemistry
2 answers:
masya89 [10]3 years ago
8 0
It is the simplest form of matter
Anettt [7]3 years ago
4 0

Answer:

I believe the answer is A: *It is the simplest form of matter" not 100% sure but I think that's correct

Explanation:

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The hydrogen ions in the core of the sun move at high speed. Colliding together and sticking to each other.
kenny6666 [7]

Answer:

The process describes the source of energy of the Sun such that it shines as a result of nuclear fusion of hydrogen taking place.  

Explanation:

The Sun generates energy by hydrogen within the Sun undergoing nuclear fusion to form helium.

Nuclear fusion reaction involves combining of two or more atomic nuclei to produce one or more completely different atomic nuclei as well as protons or neutrons, with a loss or gain of mass and the release or absorption of energy.

The process whereby four hydrogen atoms combine to form one helium atom  with a mass deficit, which is accounted for by the release of energy, result in the high intense light of the Sun.

8 0
3 years ago
Identify the type of molecule shown in the picture
BlackZzzverrR [31]
1) acid
2) ether
3) ester
4) aldehyde 
5) ketone
6) amine 
7) alcohol 
7 0
3 years ago
A 4.36-g sample of an unknown alkali metal hydroxide is dissolved in 100.0 mL of water. An acid-base indicator is added, and the
BARSIC [14]

Answer:

Rb+

Explanation:

Since they are telling us that the equivalence point was reached after 17.0 mL of   2.5 M HCl were added , we can calculate the number of moles of HCl which neutralized our unknown hydroxide.

Now all the choices for the metal cation are monovalent, therefore the general formula for our unknown is XOH and  we know the reaction is 1 equivalent acid to 1 equivalent base. Thus we have the number of moles, n,  of XOH and from the relation n = M/MW we can calculate the molecular weight of XOH.

Thus our calculations are:

V = 17.0 mL x 1 L / 1000 mL = 0.017 L

2.5 M HCl x 0.017 L = 2.5 mol/ L x 0.017 L = 0.0425 mol

0.0425 mol = 4.36 g/ MW XOH

MW of XOH = (atomic weight of X + 16 + 1)

so solving the above equation we get:

0.0425 = 4.36 / (X + 17 )

0.7225 +0.0425X = 4.36

0.0425X = 4.36 -0.7225 = 3.6375

X = 3.6375/0.0425 = 85.59

The unknown alkali is Rb which has an atomic weight of 85.47 g/mol

6 0
3 years ago
Silver is a white metal that is an excellent conductor. Silver tarnishes when exposed to air and light. The density of silver is
Stells [14]

Answer:

c tarnishes in air

Explanation:

After silver has been exposed to air that contains sulphur gases, discoloration would occur. there would be darkening that is caused by the reaction with gases.When any silver object tarnishes, it brings about a disfiguring of that object. Hydrogen sulphide would be needed for this to happen. silver sulphide is black and a if a thin layer should form on any surface, it ill darken it. This  is what we refer to as tarnishing.

3 0
3 years ago
Read 2 more answers
( i need help on this one )
lara [203]

Answer:

1. False

2.True

Explanation:

7 0
3 years ago
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