题目10g NaCl溶于100g水中,该溶液的质量分数为[ ]。A. 9.1%B. 8.1%C. 7.1%D. 10.0%E. 20.0%10g NaCl溶于100g水中,该溶液的质量分数为[ ]。A. 9.1%B. 8.1%C. 7.1%D. 10.0%E. 20.0%题目解答答案A. 9.1%