Explanation:
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The student originally has 252 grams of water in this experiment.
LAW OF CONSERVATION OF MASS:
- The law of conservation of mass explains that matter (mass) can neither be created nor destroyed but can be changed from one form to another.
- This means that in a chemical reaction, the sum of the masses of the reactants must equate to the total mass of product(s).
- According to this question, a student conducts an experiment to separate water into hydrogen and oxygen. The student collects 28.0 g of hydrogen and 224.0 g of oxygen.
- Since hydrogen and oxygen are the constituent elements of water, the sum of their masses must equate the mass of water.
- Therefore, 224g of oxygen + 28g of hydrogen = 252g of water.
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Plastics release chemicals and fumes when burned which can harm the enviroment around them. A good method for their disposal would be recycling them so they can later be used as something else.
Answer:
Fluorine = 7 v.e.
Sulfur = 6 v.e.
Oxygen = 6 v.e.
Nitrogen = 5 v.e.
Carbon = 4 v.e.
Explanation:
Valence electrons can be easily determined by understanding groups (columns). Every element in. . .
column 3A (13) = 3 v.e.
column 4A (14) = 4 v.e.
column 5A (15) = 5 v.e.
column 6A (16) = 6 v.e.
column 7A (17) = 7 v.e.
Answer:
H2O = (1×2) + ( 1×16)
2+ 16
= 18
<u>22.9</u>
18
1.27
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