c. SO2 and CO. folown s im fas tora tion or the metal with a protective oxide su
ID: 1000651 • Letter: C
Question
c. SO2 and CO. folown s im fas tora tion or the metal with a protective oxide surface film that prevents further reaction of the metal with Active metals often form oxygen in the air. Which one of the following formulas for the metal oxide is not correct? 24. d. Fe2O3 is iron(III) oxide. e. Mg02 is magnesium oxide. a. Na2O is sodium oxide. c. FeO is iron(II) oxide. What is the correct symbol for a proton? b. c. b. Al,O, is aluminum oxide. 25. d. e. o -1 Which one of the following acids has an incorrect formula or is not named correctly? a. HCl, hydrochloric acid b. H2SO4, sulfuric acid c. H2COs, carbonic acid 26. HNO2, nitric acid HF, hydrofluoric acid d. e.Explanation / Answer
24. Magnesium oxide es wrong because the nox of your Mg is +2, so your correct formula has to be MgO as your O has -2 of nox and it simplifies= +2Mg O-2= Mg2O2= MgO OPTION E
25. A Proton has to have a mass of 1 (1p) and a charge of positive 1 too (11p) OPTION B
26. HNO2 is nitrous acid, Nitric acid formula is H2NO3
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