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Aloiza [94]
3 years ago
11

Which is not a compound? water silicon dioxide oxygen gas carbon dioxide gas

Chemistry
1 answer:
Illusion [34]3 years ago
4 0
All of these are compounds except oxygen because a compound is two or more different elements bonded together.
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A particle containing 8 protons, 10 neutrons, and 8 electrons is called a(n)
enot [183]

O2- indicates an ion of oxygen having two extra electrons. I.e., since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).

3 0
2 years ago
What volume will water vapor form when 40 liters of hydrogen completely reacts with 25 liters of oxygen? Assume the temperature
Brut [27]
                                                             2H2           +           O2 ---->2H2O  
number of moles in reaction                 2 mol                  1 mol       2 mol
number of liters in the reaction         2*22.4 L                1*22.4 L    2*22.4L
We can see that volumes of the gases are proportional to coefficients in the reaction ( if gases are under the same conditions), so we can write

                              2H2           +           O2 ---->2H2O  
                               2 L                         1 L          2 L
     given                 40 L                      ( 25 L)     40 L

We can see that we have excess of O2,
because if 2 L H2 are needed 1 L O2, then 40 L of H2 are needed 20 L O2.

So, limiting reactant is H2, and we will need to calculate Volume of H2O using H2.
2L H2 give 2L H2O(gas), so 40 L H2 give 40 L H2O.
7 0
3 years ago
The product of 2 × 104 cm and 4 × 10–12 cm, expressed in scientific notation is ____.
Hatshy [7]

Answer:

b,,

Explanation:

7 0
3 years ago
8. Which type of element requires the least amount of energy to remove an electron?​
pychu [463]

Answer:

nonmetals

Explanation:

4 0
2 years ago
Please help and thank you so much
olchik [2.2K]
A. Sorry if I’m wrong :(
8 0
2 years ago
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