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1河北省2023-2024学年九年级第一次学情评估化学试卷答案

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omuch!”saidDoraThenwhatcanwedo？Myproposalisx,youcanthatstrtadeThefirststopalongvertoseeherbird.behavioruringyhStationsplein,outsideLeDorawasverygladallheybewllpdHereIappeal"Thetreescreatedsuchatloftorekillandpurchaseoralongtimethatimmediatelyfeltrelaxedwildanimalsstheirpet.That'sall.Thankyou!ortoldherparents第二节nottomakeherParagraph1:olaywithher.DoraTiminueslaer,theyeneredMr.Michell'sAidensaidheditmeantoberude.andvisither!ButHeexplainedhismomwasHelen,whowase.SinceDorahadjustfiredfromherjobbecauseofbeinglateHowever,shefeltforwork.Heunderstoodthedecisionbuthishardworkingmomreallyneededthisjob,soheaskedifthebosscouldgiveheranotherchancetoworkthere.Hepromisedhewouldhelphismoisothatshewouldneverbelateagain.Mr.Mitchelllistenedcarefullyandgottoknowthefamily'ssituation.HerepliedsincerelythathewoulddealwiththethingParagraph2:“Thkyou,.M.Miwhnl,,”Aidendbfreboutherdecision.healkedy.WhenAidenretumedhome,henoticedHelentalkingonthephoneandsmiling.Thenshesaidthanksquicklyandhungup.Shetoidxihatsheothejoback.AidenigteftoMrMiteh.He“Mom,Iamoldenoughtolookaftermyselfdhelththehour案见下期A版中缝)anymore.ThewordstoHelensyes.AthoughAidenheprove箱：syxxb123@126.com街97号邮编：100031hisgrowthandhisloveforhismomwithhisownbehavior.《双语学习报》高一、高二、高三年级每期

(5)铁酸盐(钠、钾)为六价铁盐,是一种新型消毒剂。干法制备Na2FeO4的主要反应化学方程式为2FeSO4+6Na2O2Na2FeO4+Na2O+Na2SO4+,完成并配平该方程式。若生成1molNa2FeO4,,则转移的电子数目为。

8.设NA为阿伏加德罗常数的值。NH3和O2在一定条件下发生反应:2NH3+2O2N2O+3H2O。,下列叙述错误的是A.上述反应生成18gH2O时断裂N键的数目为2NAB.11.2L(标准状况)还原剂反应时转移的电子数为2NAC.34gNH3(标准状况)参与反应时生成氧化产物的分子数为4NAD.常温下,32gO2参与反应时,生成还原产物的分子数为2NA

1河北省2023-2024学年九年级第一次学情评估化学