Số oxi hoá của nitơ trong NH3, H2SO4, NO3 lần lượt là:

Chemistry

1 answer:

NikAS [45]3 years ago

6 0

Answer:

3,6,6...................................

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The atomic masses of 35-Cl (75.53 percent) and 37-Cl (24.47 percent) are 34.968 amu and 36.956 amu, respectively. Calculate the

AlladinOne [14]

Answer:

35.45 amu is the average atomic mass of chlorine.

Explanation:

The average atomic mass is given :

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Atomic mass of 35-Cl = 34.968 amu

Percentage abundance of 35-Cl = 75.53%

Fractional abundance of 35-Cl = 0.7553

Atomic mass of 37-Cl = 36.956 amu

Percentage abundance of 37-Cl = 24.47%

Fractional abundance of 37-Cl = 0.2447

Average atomic mass of chlorine:

$=34.968 amu\times 0.7553+36.956 amu\times 0.2447=35.45 amu$

35.45 amu is the average atomic mass of chlorine.

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In the following reaction, what coefficient will be written before the oxygen molecule (O2) to balance the chemical equation? (1

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At catalyst is ______.

AlexFokin [52]

Heya!!!

Answer to your question:

A catalyst is ______
B. Not used up in a reaction.

Catalyst do not change the amount of reactants or products or itself get used but it just change the rate of reaction.

Hope it helps *_*

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A solution

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