#chemsirmcchallenge

[chemsir-talking-chemistry]

[M.C. Challenge] Iron reacts with dilute hydrochloric acid to produce A. oxygen. B. chlorine. C. iron(II) chloride. D. iron(III) chloride. 🤔 👆Choose the best answer.👆 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #iron #Fe #DiluteHydrochloricAcid #HydrochloricAcid #HCl #metal #2021dse #2022dse #2023dse #hkdse #dse #dsefighter #dse2021 #dse2022 #dse2023 #Chemsir同你講化學 #化學 #科學 #鐵 #稀氫氯酸 #稀鹽酸 #氫氯酸 #鹽酸 #金屬 #Chemsir https://www.instagram.com/p/CHH-h08BLHK/?igshid=q3p6r445q3or

[chemsir-talking-chemistry]

[M.C. Challenge] What is the chemical formula of quicklime? A. Ca B. CaO C. CaCO₃ D. Ca(OH)₂ 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #CalciumOxide #CaO #CalciumCarbonate #CaCO3 #limestone #quicklime #SlakedLime #limewater #2021dse #2022dse #2023dse #hkdse #dse #dse2021 #dse2022 #dse2023 #Chemsir同你講化學 #化學 #科學 #生石灰 #熟石灰 #氧化鈣 #碳酸鈣 #電子 #Chemsir https://www.instagram.com/p/CFl_JFihzpP/?igshid=vatll27vnxnr

[chemsir-talking-chemistry]

[M.C. Challenge] Which of the following metals can be extracted by heating metal oxide with carbon (i.e. carbon reduction)? A. sodium B. magnesium C. zinc D. aluminium 🤔 Choose the best answer👆 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #extraction #extract #MetalExtraction #CarbonReduction #metal #elements #element #2021dse #2022dse #2023dse #hkdse #dse #dsefighter #dse2021 #dse2022 #dse2023 #Chemsir同你講化學 #化學 #科學 #教育 #金屬提取 #碳還原 #金屬 #元素 #Chemsir https://www.instagram.com/p/CGhhKVwBt0c/?igshid=1gbjlz3ludnpc

[chemsir-talking-chemistry]

[M.C. Challenge] How many neutrons are there in a lithium-7 atom? A. 3 B. 4 C. 6 D. 7 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #lithium #Li #proton #neutron #electron #nucleus #atom #element #2021dse #2022dse #hkdse #dse #dsefighter #dse2021 #dse2022 #HongKong #Chemsir同你講化學 #化學 #科學 #質子 #中子 #電子 #原子核 #原子 #Chemsir https://www.instagram.com/p/B_rDPyGhzm5/?igshid=1e0l31ht3jblr

[chemsir-talking-chemistry]

[M.C. Challenge] Graphite has a A. giant metallic structure. B. giant covalent structure. C. giant ionic structure. D. similar molecular structure. 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #graphite #carbon #atom #atoms #CovalentBond #electron #electrons #delocalized #DelocalizedElectrons #2021dse #2022dse #2023dse #hkdse #dse #dsefighter #dse2021 #dse2022 #dse2023 #Chemsir同你講化學 #化學 #科學 #石墨 #碳 #電子 #Chemsir https://www.instagram.com/p/CE_wGoaB5ZS/?igshid=15g794tairo0n

[chemsir-talking-chemistry]

[M.C. Challenge] What is the chemical formula of ammonium nitrate? A. NH₃NO₂ B. NH₃NO₃ C. NH₄NO₂ D. NH₄NO₃ 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #ChemicalFormula #explosion #explosive #AmmoniumNitrate #Lebanon #Beirut #Beirut_Lebanon #2021dse #2022dse #hkdse #dse #dse2021 #dse2022 #Chemsir同你講化學 #化學 #科學 #爆炸 #爆炸性 #硝酸銨 #爆炸品 #危險品 #黎巴嫩 #貝魯特 #化學式 #Chemsir https://www.instagram.com/p/CDnvR17B4mO/?igshid=1xd6xapjf0ka6

[chemsir-talking-chemistry]

[M.C. Challenge] What is the name of the element with the chemical symbol Pb？ A. potassium B. phosphorus C. platinum D. lead 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #ChemicalSymbol #Pb #elements #element #PeriodicTable #2021dse #2022dse #2023dse #hkdse #dse #dsefighter #dse2020 #dse2021 #dse2022 #dse2023 #HongKong #Chemsir同你講化學 #化學 #科學 #元素周期表 #元素週期表 #元素 #元素符號 #化學元素 #Chemsir https://www.instagram.com/p/CC2oAMNh_Qd/?igshid=1re3gxr4jcufr

[chemsir-talking-chemistry]

[M.C. Challenge] The TOTAL number of electrons in a molecule of H₂O is A. 6. B. 8. C. 10. D. 18. 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #water #H2O #molecule #electrons #electron #ElectronDiagram #CovalentBond #CovalentBonds #CovalentBonding #covalent #IntermolecularForces #2021dse #2022dse #hkdse #dse #dsefighter #dse2021 #dse2022 #Chemsir同你講化學 #化學 #科學 #電子 #分子 #共價鍵 #Chemsir https://www.instagram.com/p/CCISnxLBgxJ/?igshid=dzdex7ci03od

[chemsir-talking-chemistry]

[M.C. Challenge] Which of the following statements regarding the above energy profile is INCORRECT? A. The reaction involves the breaking of A—B bonds. B. The reaction involves the formation of B—C bonds. C. The reaction is endothermic. D. The reaction is a single-stage reaction. 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #EnergyProfile #energy #PotentialEnergy #ReactionCoordinate #EnthalpyChange #EnthalpyLevelDiagram #EnthalpyLevel #enthalpy #ActivatedComplex #TransitionState #ActivationEnergy #ExothermicReaction #EndothermicReaction #exothermic #endothermic #2021dse #hkdse #dse #dsefighter #dse2021 #HongKong #Chemsir同你講化學 #化學 #科學 #Chemsir https://www.instagram.com/p/CB7mpEFBV_U/?igshid=6qdx4x01xzdj

[chemsir-talking-chemistry]

[M.C. Challenge] Which of the following statements about the equilibrium system N₂O₄(g) ⇌ 2NO₂(g) is INCORRECT? A. Before reaching equilibrium, [N₂O₄(g)] is decreasing. B. Before reaching equilibrium, [NO₂(g)] is increasing. C. At equilibrium, [N₂O₄(g)] = [NO₂(g)]. D. At equilibrium, forward reaction rate = backward reaction rate. 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #ChemicalEquilibrium #ChemicalEquilibria #DynamicEquilibrium #equilibrium #equilibria #EquilibriumPosition #ForwardReaction #BackwardReaction #NitrogenDioxide #NO2 #DinitrogenTetroxide #N2O4 #2021dse #hkdse #dse #dsefighter #dse2021 #HongKong #Chemsir同你講化學 #化學 #科學 #化學平衡 #二氧化氮 #四氧化二氮 #Chemsir https://www.instagram.com/p/CBYOnKZBQv2/?igshid=156le0ozmamh5

[chemsir-talking-chemistry]

[M.C. Challenge] Which of the following molecules does not have an octet structure? A. nitrogen, N2 B. nitrogen dioxide, NO2 C. dinitrogen tetroxide, N2O4 D. nitrous acid, HNO2 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #NitrogenDioxide #NO2 #DinitrogenTetroxide #N2O4 #electrons #electron #octet #OctetStructure #InorganicChemistry #2020dse #2021dse #hkdse #dse #dsefighter #dse2020 #dse2021 #HongKong #Chemsir同你講化學 #化學 #科學 #二氧化氮 #四氧化二氮 #無機化學 #電子 #Chemsir https://www.instagram.com/p/B_NB2-ABcJX/?igshid=1f2443h47tlze

[chemsir-talking-chemistry]

[M.C. Challenge] What is the number of neutrons in a sodium-23 atom? A. 11 B. 12 C. 23 D. 34 🤔 ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #ChemsirMCChallenge #sodium #Na #proton #neutron #electron #atom #element #2020dse #2021dse #2022dse #hkdse #dse #dsefighter #dse2020 #dse2021 #dse2022 #HongKong #Chemsir同你講化學 #化學 #科學 #質子 #中子 #電子 #原子 #Chemsir https://www.instagram.com/p/B-yLAcvhI2Q/?igshid=xd4sh7gydz24

[chemsir-talking-chemistry]

[M.C. Challenge] ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #education #ChemsirMCChallenge #abundant #element #elements #Earth #aluminium #oxygen #2020dse #2021dse #2022dse #hkdse #dse #dsefighter #dse2020 #dse2021 #dse2022 #HongKong #HK #Chemsir同你講化學 #化學 #科學 #教育 #地球 #元素 #Chemsir https://www.instagram.com/p/B1Vv2GgFIsu/?igshid=w35d40f8dl43

[chemsir-talking-chemistry]

[M.C. Challenge] ------------------------------------------------------------------------ 👍Please like, comment and share @chemsir.talking.chemistry and tag your friends. ------------------------------------------------------------------------ 👉Follow @chemsir.talking.chemistry and @chemsir_lee_wai_hon for more chemistry materials. ------------------------------------------------------------------------ 🙏🏻Thank you for your support. Wish you enjoy the page! ------------------------------------------------------------------------ #ChemsirTalkingChemistry #chem #chemistry #science #education #ChemsirMCChallenge #PeriodicTable #element #elements #AtomicNumber #MassNumber #neutron #2020dse #2021dse #2022dse #hkdse #dse #dse2020 #dse2021 #dse2022 #HongKong #HK #Chemsir同你講化學 #化學 #科學 #教育 #元素周期表 #元素週期表 #元素 #Chemsir https://www.instagram.com/p/B1Q14tqlBbf/?igshid=133had8a1bcwm