Bantu kak

<p>Pada keadaan STP, 1 mol gas jumlah atom/molekul = bilangan Avogadro (A)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 6,02 x 10²³</p><p>CH_4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3,01 x 10¹¹</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 3,01 x 10¹¹ / 6,02 x 10²³</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= &nbsp;5 x 10^-13 mol</p><p>Massa CH₄ = 5 x 10^-13 mol x Mr CH₄</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 5 x 10^-13 x 16</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= &nbsp; 8 x 10^-12 gram</p>