Answer:
<u>3</u>KClO4 + KCl ➡️ <u>4</u>KClO3
<u>2</u>AlI3 + <u>3</u>HgCl2 ➡️ <u>2</u>AlCl3 + <u>3</u>HgI2
Answer:
Holmium
Explanation:
Electronic configuration:
[Xe] 6s² 4f⁵ 5d⁶
To know this element, we must first find the atomic number and then look for its position on the periodic table.
Number of electrons in [Xe] = 54;
So the total number of electrons = 54 + 2 + 5 + 6 = 67
This element has an atomic number of 57. On the periodic table, it is Holmium
Answer:
ok....sorry...I'm taking all the points! ^_^"
Explanation:
N(Na)=0.255 mol
M(Na)=22.990 g/mol
m(Na)=n(Na)M(Na)
m(Na)=0.255*22.990=5.862 g