The Plum Pudding Model is a model of atomic structure proposed by J.J. Thomson in the late 19th century. Thomson had discovered that atoms are composite objects, made of pieces with positive and negative charge, and that the negatively charged electrons within the atom were very small compared to the entire atom.
Answer:
The correct answer is C. The average score on the biology test was 78%. It only has a few words in it, but have very specific so we can imsgine it in our heads, it'll also be the best scientific investigation.
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Answer:
Explanation:
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In this case, we use the boiling point elevation colligative property equation for both ethanol and carbon tetrachloride as shown below:
Now, since both the boiling point and the concentration of the solutions are equal, we solve a 2x2 system of lineal equations:
Subtracting the equations one obtains the molality (concentration):
Finally, solving for the boiling temperature of the solution one obtains:
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Answer:
Cu (s) + 2H₂SO₄(aq) —> CuSO₄(s) + 2H₂O (l) + SO₂(s)
Explanation:
Copper metal => Cu
Sulphuric acid => H₂SO₄
copper (II) sulfate => CuSO₄
Water => H₂O
sulfur dioxide => SO₂
The equation for the reaction between copper metal and aqueous sulfuric acid can be written as follow:
Cu + H₂SO₄ —> CuSO₄ + H₂O + SO₂
The above equation can be balance as follow:
Cu + H₂SO₄ —> CuSO₄ + H₂O + SO₂
There are 2 atoms of S on the right side and 1 atom on the left side. It can be balance by writing 2 before H₂SO₄ as shown below:
Cu + 2H₂SO₄ —> CuSO₄ + H₂O + SO₂
There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 2 before H₂O as shown below:
Cu + 2H₂SO₄ —> CuSO₄ + 2H₂O + SO₂
Thus, the equation is balanced.
Include the phase of each reactant and product, we have:
Cu (s) + 2H₂SO₄(aq) —> CuSO₄(s) + 2H₂O (l) + SO₂(s)
Answer: The correct option is d.
Explanation: Decomposition reactions are the chemical reactions and are defined as the reactions in which a larger molecule breaks down into two or more smaller molecules.
General equation for this chemical reaction:
From the given options above, only one option corresponds to this which is option d.
Option a is a type of combination reaction.
Option b is a type of combustion reaction.
Option c is also a type of combination reaction.