实验室有一瓶硫酸溶液，老师请小红同学设计方案测定该废液中硫酸的质量分数．小红同学先取一洁净小烧杯，称其质量为18.2g，然后往其中倒入少量硫酸废液后称量，总质量为33.2g，之后，将一枚质量为10.8g的铁钉（已用砂纸打磨去铁锈）放入该小烧杯中反应，待铁钉表面不再有气泡产生后，再次称量，总质量为43.9g．请回答下列问题：

（1）反应中产生的气体的质量是　____ 　．

（2）计算该废液中硫酸的质量分数（写出计算过程，计算结果保留一位小数）____ ．

（3）若铁钉的铁锈（主要成分为氧化铁）未除净，对计算结果的影响是____  （选“偏大”、“偏小”、“无影响”），原因是____ ．反应方程式为____ ．

    I went on vacation with my family last summer. “Wake up! It's time to go fishing,” My mom woke me up. After having breakfast we got on a boat. Getting up at 6 a.m. was really early and I was not happy, but later, I had fun.

    My uncle caught (抓住) a big fish first. And my mom caught one, too. Then I caught a Black Drum. Next, my dad caught a big Sheepshead. The captain said no one caught a big fish like this one. We were all happy when we heard this. Later we tried to catch small sharks (鲨鱼). My grandpa caught one, but it snapped the line (咬断绳子). My uncle caught one, but it also snapped the line. My dad caught one at last. It didn't look so scary but was a little funny.

    Then our fishing activity was over, and we went back with all the fishes. We were tired but happy!