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Misha Larkins [42]
4 years ago
11

Does my body get all its energy from the sun?

Chemistry
1 answer:
kirza4 [7]4 years ago
3 0
Yes, and no. We all should know by know we do need the sun to survive, but we also need for energy is oxygen and the food we eat. 
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What is a bond between a positive and negative ion called?
BartSMP [9]
B) ionic bond

(although in reality, every bond is fundamentally the sharing of a pair of electron. but due to unmutal electonegativity, the molecule becomes polar)
7 0
4 years ago
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True or False When nitrogen enters a chemical reaction it is looking for three neutrons.
AysviL [449]

Answer:

False

Explanation:

Every chemical element undergoes a reaction in order to fulfill the completion of their outermost shell. This is the case of nitrogen (symbol "N"), which is an element found in group 5 of the periodic table with atomic number 7 (i.e. 1s2 2s2 2p3). It possesses three valence electrons in it's outermost shell.

Looking at the configuration of the Nitrogen atom, it requires three electrons to complete its electron shell. Hence, nitrogen will enter a reaction in order to have its need for THREE ELECTRONS met in order to have its electron shell full.

Note that, nitrogen enters a chemical reaction to look for three electrons not three neutrons.

3 0
4 years ago
13 <br> Help lol please thanks
slamgirl [31]

Answer:

Mass = 15.13 g

Explanation:

Given data:

Number of atoms of hydrogen = 8.11×10²³

Mass of ammonia formed = ?

Solution:

Chemical equation:

3H₂ + N₂          →    2NH₃

Number of moles of hydrogen:

1 mole contain 6.022× 10²³ atoms

8.11×10²³ atoms × 1 mol / 6.022× 10²³ atoms

1.35 mol

Now we will compare the moles of hydrogen and ammonia:

            H₂        :         NH₃

             3         :           2

           1.35      :         2/3×1.35 = 0.89 mol

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.89 mol × 17 g/mol

Mass = 15.13 g

5 0
3 years ago
1. Here is a chemical equation: C2H2 + O2 → CO2 + H2O
Evgen [1.6K]

Answer:

1)  a) 2 C2H2 +  3O2 -->  2CO2 +  2H2O

b) Combustion Reaction

c) Bonds will be broken on the reactant side which will require energy.

d) It agrees with the law of conservation of mass because there are the same amount of molecules of each element on both sides of the equation, meaning mass was not created nor destroyed.

2) a) 2Na + Cl2 --> 2NaCl

        Synthesis

   b) 2Fe + O2 --> 2FeO

        Synthesis

Hope this helps!

Explanation:

6 0
2 years ago
True or false Fossils teach us about the history of life
Anika [276]
True in a evolutionary sense
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