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ladessa [460]
3 years ago
8

n the periodic table, the atomic mass of oxygen is listed as 15.9994 amu. Based on this, one can deduce that the most common ___

_________ of oxygen contains a total number of protons plus neutrons equalling _______.
Chemistry
2 answers:
Anit [1.1K]3 years ago
4 0
Isotope- variation of an element

Sixteen- atomic number of oxygen
Marianna [84]3 years ago
3 0

Answer:- Isotope for the first blank and sixteen for second blank.

Explanations:- The sum of protons and neutrons makes the mass number of the element. Since atomic mass is the average of isotopes of the element, it is not a whole number but the mass number is a whole number as it is the sum of number of protons and neutrons.

15.9994 is almost 16 means the mass number for the most common isotope of oxygen is 16.

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Explanation:

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See explaination

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What condition must be met for a battery to be rechargeable?
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When NH3(g) reacts with N2O(g) to form N2(g) and H2O(g), 105 kcal of energy are evolved for each mole of NH3(g) that reacts. Wri
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The given unbalanced chemical reaction is,

NH_3(g)+N_2O(g)\rightarrow N_2(g)+H_2O(g)+105kcal

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of individual elements are not balanced.

In order to balanced the chemical reaction, the coefficient 2 is put before the NH_3, the coefficient 3 is put before the N_2O\text{ and }H_2O and the coefficient 4 is put before the N_2.

The energy evolved in this reaction = 105Kcal\times 2=210Kcal

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2NH_3(g)+3N_2O(g)\rightarrow 4N_2(g)+3H_2O(g)+210kcal

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