Na-23 has 12 neutrons. What is it’s atomic number?
2 answers:
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Answer:
The compound is N2O4
Explanation:
We have certain important pieces of information about the compound;
1) it is an oxide (a binary compound of nitrogen and oxygen)
2) there are no N-N bonds present
3) there are no O-O bonds present
Since it contains only nitrogen and oxygen then nitrogen accounts for 25.9% of the molecule by mass then oxygen should account for (100-25.9) = 74.1% oxygen
Relative atomic mass of oxygen = 16
Relative atomic mass of nitrogen = 14
We now deduce the empirical formula
Nitrogen. Oxygen
25.9/14. 74.1/16
1.85/1.85. 4.6/1.85 (divide through by the lowest ratio)
1 2
Empirical formula is NO2
To find the molecular formula
(NO2)n = 108
(14+2(16))n= 108
46n=108
n= 108/46
n= 2
Therefore molecular formula= N2O4
Answer: The volume of the new solution is 83.33 mL.
Explanation:
Given: = 200 mL,
= 0.5 M
= ?,
= 1.2 M
Formula used to calculate the volume of new solution is as follows.
Substitute the values into above formula as follows.
Thus, we can conclude that volume of the new solution is 83.33 mL.