Double replacement because H and K are both switching
Oxygen atoms are all different whereas hydrogen atoms are the same but also lighter
Sound waves, I'm pretty sure.
Cation means postive charged
answer is potassium.
being +1
The melting points of the compounds from the choices are listed below:
a. C25H52 -> +47 to +56 degrees celsius
b. Hg -> -38.83 degrees celsius
c. CaCl2 -> +772 degrees celsius
d. CuO -> +1326 degrees celsius
It is evident from the listed melting points above that mercury (Hg) has the lowest melting point. This is why mercury is liquid at room temperature.
