Respostas

2013-09-04T12:37:01-03:00
P*V=n*R*T

4*60 = n * 0,082 * 300
240 = n * 24,6

240/24,6 = n

*******************
n ~=  9,76 mols
*******************

Letra B)

Massa do gás = 9,76 * 64 = 624,24g