Which of the following compounds will produce H2O as one of the products when it decomposes?
1 answer:
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Answer:
Absolute error
% Error 5
Explanation:
The absolute error is the the difference in the measured value and the actual value of a quantity.
Here the actual value is grams
The measured value is grams
Absolute error
Percent error
Where AE stands for absolute error and AV stands for absolute value.
%
Answer:
Explanation:
The question is asking to write the <em>isotopic symbol </em>of the form for the <em>sodium isotope with 13 neutrons</em>.
In general, the isotopic symbol in the given form shows:
- The element's chemical symbol: X
- A: mass number of the isotope, written as a superscript to the left of the element's simbol, and
A = number of protons + number of neutrons
- Z: atomic number of the isotope, written as a subscript to the left of the elements's symbol,
Z = number of protons
The atomic symbol of sodium is Na.
The atomic number, or number of protons, is the same for every isotope of the element, and you can find it in any periodic table. Tha atomic number of sodium is 11. Thus:
- Z = 11
The mass number is the number of protons plus neutrons, hence:
- A = 11 + 13 = 24
Now you can write the isotope symbol for the sodium isotope with 13 neutrons: