kak bantu kak

<p>Mr CuS = 64+32 = 96 g mol^-1</p><p>Mol CuS = massa CuS/ Mr Cus</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 29 g / 96 g mol^-1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 0,30 mol</p><p>gunakan perbandingan koefisien. 1 mol CuS setara dengan 1 mol O_2.MAKA :</p><p>Massa O₂ = 0,30 mol x Mr O₂</p><p>_{&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}= 0,30 mol x (16+16)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 9,6 g</p>