find the empircal formula of a compound with the following percent composition: 27.05% Ma, 56.47% O, and 16.48% N. name the compound

Why are pipes bursting in the in extremely cold weather?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out