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Verizon [17]
3 years ago
14

What information does the atomic number provide about an atom?

Chemistry
1 answer:
rjkz [21]3 years ago
6 0

Identifies the number of protons a single atom of the element contains.

The atomic number helps people identify elements according to the number of protons one atom of the element has. It essentially defines the element
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What is the Percent yield is 4.65 got copper is produced by 1.87 percent yield is 4.65 got copper is produced when 1.87 grams of
marta [7]

Answer:

Percent yield = 69.4%

Explanation:

Given data:

Percent yield  = ?

Actual yield of copper = 4.65 g

Mass of aluminium = 1.87 g

Mass of copper sulfate = excess

Solution:

Chemical equation:

2Al + 3CuSO₄   →   Al₂(SO₄)₃ + 3Cu

Number of moles of Aluminium:

Number of moles = mass/ molar mass

Number of moles = 1.87 g/27 g/mol

Number of moles = 0.07 mol

Now we will compare the moles of Al with copper.

                 Al           :            Cu

                   2           :              3

                0.07         :              3/2×0.07 =0.105 mol                    

Mass of Copper:(Theoretical yield)

Mass = Number of moles × molar mass

Mass = 0.105 mol × 63.5 g/mol

Mass = 6.7 g

Percent yield:

Percent yield = Actual yield / theoretical yield × 100

Percent yield = 4.65 g/ 6.7 g × 100

Percent yield = 69.4%

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Which of the following is NOT a characteristic of most ionic compounds?
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Answer:

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.

Explanation:

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Question 2 of 5
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Precision relates to how close the answers are to each other, so I’d think it would be D because of the limited range between data points.
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