题目

Next month, I’m traveling to a remote area of Central Africa and my aim is to know enough Lingala — one of the local languages — to have a conversation. I wasn’t sure how I was going to manage this — until I discovered a way to learn all the vocabulary I’m going to need. Thanks to Memrise, the app I’m using. It feels just like a game.“People often stop learning things because they feel they’re not making progress or because it all feels like too much hard work,” says Ed Cooke, one of the people who created Memrise. “We’re trying to create a form of learning experience t8．下列说法中错误的是（　　）A．5 g 98%的硫酸（密度为1.84 g/cm3）与5 mL 18.4 mol/L硫酸的浓度是不同的B．制成0.5 L 10 mol/L的盐酸，需要氯化氢气体112 L（标准状况）C．0.5 L 2 mol/L BaCl2溶液中，Ba2+和Cl-总数为3×6.02×1023D．从1 L 1 mol/L的NaCl溶液中取出10 mL，其浓度仍是1 mol/L