[luiseduardo]

Hello,
I'm starting to study equivalent and I'm having trouble in this question:

0.100 g of a metal M reacts with excess HCl until the disappearance of the metal. The gas given off was collected, dried and measured at 0 degrees celsius and 760 mmHg, finding herself a volume of 124.4 cm³. It is known that the molar mass of metal is 27g/mol, calculate the equivalent weight of metal M and its valence.


Answer:  9 g/Equiv. and Valence = 3

Thanks.

[DevaDevil]

how many moles of the gas do you have?

use the gas law with appropriate units.