某化學(xué)興趣小組的同學(xué)稱取了16.0g高錳酸鉀樣品制取氧氣,實(shí)驗(yàn)過程中用數(shù)據(jù)傳輸儀測得試管中固體物質(zhì)的質(zhì)量(m)與反應(yīng)時(shí)間(t)的關(guān)系如表所示:
反應(yīng)時(shí)間t/s |
t0 |
t1 |
t2 |
t3 |
t4 |
t5 |
t6 |
試管中固體物質(zhì)的質(zhì)量m/g |
16.0 |
15.5 |
15.0 |
14.5 |
14.4 |
14.4 |
14.4 |
請(qǐng)通過計(jì)算回答:同學(xué)們稱取的高錳酸鉀樣品是否為純凈物?