The letter 'H' is never pronounced in Spanish. Such examples are "hasta", "horchata", and "humanos". The letter "H" is almost always used exclusively as the first letter in words, but it may be used in the middle of words such as "mucho" or "hechar", where it makes a "ch" sound.
the appropriate defintite article for mochilas is las
las mochilas
Explanation:
translation - abstract illiterate mummy