(c) sodium hydrogen carbonate

3. When the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of FeO and Fe2C3. In a certain experiment, 40.00 g iron metal was reacted with 22.40 g oxygen. After the experiment, the iron was totally consumed, and 6.48 g O2 gas remained. Calculate the mounts of FeO and Fe2O3 formed in this experiment. (Fe = 55.85)

4. Draw all the structural and geometrical (cis-trans) isomers of C3H5CI.

(a) sodium peroxide

(b) ammonia

(d) sodium hypochlorite

(e) potassium bromate

    Being the global language, English has been deemed important in both the academic world and the work place. University students in Taiwan, accordingly, are required to reach a certain level of proficiency in English~commonly the intermediate level at leastbefore they are allowed to graduate. The requirements, however, have been received with both warm welcome and heated objections.      Take a stand on the issue of foreign language requirements and write an essay to either support or refute the necessity of such requirements. Your essay should include an introduction, your arguments, and a conclusion. Do not forget to give your essay a title. (100%)

【已刪除】(a)

【已刪除】(b)

(c)