Answer:
3.89 g Mg
Explanation:
2M = 2 mol/L
120 mL = 0.120 L
2 mol/L *0.120 L = 0.240 mol H3PO4
3Mg + 2H3PO4 ----> Mg3(PO4)2 + 3H2
from reaction 3 mol 2 mol
given 0.240mol x mol
x = 0.240*2/3 = 0.16 mol Mg
M(Mg) = 24.3 g/mol
24.3 g/mol *0.16 mol = 3.89 g Mg
The question is incomplete, the complete question is shown in the image attached to this answer.
Answer:
139.13
Explanation:
The average atomic mass of the element Likhitium is the sum of the relative abundance of all the isotopes of Likhitium.
We obtain the relative atomic mass of Likhitium as follows;
(44.7/100 * 138) + (52.3/100 * 139) + (0.5/100 * 140) + (2.5/100 * 141)
61.7 + 73.2 + 0.7 + 3.53 = 139.13
Hence the relative abundance of Likhitium is 139.13
Answer:
3 electrons are gained by one nitrogen atom in the formation of K₃N.
Explanation:
The reaction is as follow,
<span> 6 K + N</span>₂<span> </span>→ <span> 2 K</span>₃<span>N
</span>
Oxidation of K,
K → K⁺ + 1 e⁻
Or,
6 K → 6 K⁺ + 6 e⁻
In oxidation reaction potassium atom transfers one electron per atomn and six electrons per six atoms.
Reduction of N;
N₂ + 6 e⁻ → 2 N³⁻
In reduction reaction one molecule of N₂ gains six electrons and 3 electrons per one atom
Answer:
P1V1/T1 = P2V2/T2
Explanation:
- Hope that helped! Let me know if you need further explanation. Sorry I didn't give you exaxt one, it was kinda hard to read, but that is the correct answer I put above.
