To calculate the empirical formula of a compound, we have to follow some steps:
Step 1: Calculate the number of moles of K and O.
For this we need to know the molar mass of K and O.
Molar mass of K=39.0983 g/mol
Molar mass of O=16 g/mol
Given mass of K= 32.3 g
Given mass of O= 6.61 g
Number of moles=Mass /molar mass
So, Number of moles of O=Mass /molar mass
=6.61/16
=0.41
Number of moles of K =Mass /molar mass
=32.3/39
=0.82
Step 2: Find the lowest number of moles and divide each element's moles by it:
Here the lowest number of moles are of oxygen(O) so dividing each element's moles by its mole number will give:
K =0.82/0.41
= 2
O = 0.41/0.41
= 1
So the empirical formula of the compound should be:
K₂O.
Nuclear energy produces radioactive waste
A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.
A) Magnets can attract through solid materials.
H 1s¹
He 1s²
Li [He] 2s¹
Be [He] 2s²
B [He]2s²2p¹
C [He]2s¹2p²
N [He] 2s²2p³
O [He]2s²2p⁴
F [He]2s²2p⁵
Ne [He]2s2p⁶
Na [Ne]3s¹
Mg [Ne]3s²
Al [Ne]3s²3p¹
Si [Ne]3s²3p²
P [Ne]3s²3p³
S [Ne]3s²3p⁴
Cl [Ne]3s²3p⁵
Ar [Ne]3s²3p⁶
K [Ar]4s¹
Ca [Ar]4s²