Indeed it is. Reasons being that the hydrogen bonds in the 1-propanol is difficult to break. Hence, more energy or heat is needed to be applied. Ethyl methyl ether on the other hand doesn't have hydrogen bonds and that explains why it has a lower boiling point.
*try drawing their structural formula, from there you'll be able to differentiate better*
Metallic and non-metallic properties
Non-metallic property increases across a period and decreases down the group due to the same reason due to an increase in nuclear attractive force.
I hope this helps
Sorry I don't know I would help but I'm only good at social study's and hystory and geography
Each molecule of Sr₃(PO₄)₂ contains 3 moles of Sr
So 3 moles of Sr⁺² ions are in one mole of Sr₃(PO₄)₂.