【单选题】【消耗次数：1】
计算<img class="kfformula" src="20200624/1592989794257208.png" data-latex="{9.8gH}_{2}{SO}_{4}" width="95" height="27"/>的物质的量为（ ）mol 。
①
0.5
②
1
③
0.1
④
0.2
参考答案：
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