8 chem questions :) 10 pts right first answer :] multiple choice easy!?





Question 1 (Multiple Choice Worth 2 points)Which of the following compounds will produce H2O as one of the products when it decomposes?Cu(OH) 2Hg(ClO3)2MgCO3CaOQuestion 2 (Multiple Choice Worth 2 points)Which of the following is a product formed when SO2 and H2O react together?SO3H2SO3H2OHSO2Question 3 (Multiple Choice Worth 2 points)Which of the following is a product formed when CaCO3 decomposes?Ca2O2CO2CaO2Question 4 (Multiple Choice Worth 2 points)Which of the following combinations of reactants will result in a synthesis reaction?Cl2 + HBrCa + H2OMgO + H2OC2H2 + O2Question 5 (Multiple Choice Worth 2 points)Which of the following is a synthesis reaction?C2H4 + 3 O2 2 CO2 + 2 H2O2HBr H2 + Br2CO2 + H2O H2CO3F2 + 2 HCl Cl2 + 2 HFQuestion 6 (Essay Worth 4 points)Give the complete balanced equation for the reaction that occurs when lithium carbonate (Li2CO3) is heated. You do not need to make the subscripts smaller in your answer, just write them out as regular numbers. For example: Li2CO3.Question 7 (Multiple Choice Worth 2 points)Which statement below is not true of decomposition reactions?They usually require the addition of energy for the reaction to occur.They produce more than one product at the end of the reaction.They begin with more active reactants and end with less active products.They have one compound as the reactant at the beginning of the reaction.Question 8 (Essay Worth 4 points)Write the complete balanced equation for the reaction between lead (IV) oxide (PbO2) and water (H2O). You do not need to make the subscripts smaller; just write them out as regular numbers. For example: PbO2.



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2 Responses to “8 chem questions :) 10 pts right first answer :] multiple choice easy!?”

  1. deemphasize says:

    you should help with my other chem ?’s :] Report Abuse

  2. acrocontracture says:

    1) Cu(OH)2 2)H2SO3 [sulfurous acid- not sulfuric which would be H2SO4]3)CO2 [decomposition of metal carbonates always = metal oxides and CO2]4)MgO + H20 = Mg(OH)2 [answers 1 and 2 are single replacement reactions and 4 is combustion]5)CO2 + H20 H2CO3 [Carbonated Water!]6) Li2CO3 –> Li2O + CO2 [the equation is already balanced- take stock: 4 Li, 2 C, 6 O]7) 3 is false8) I spent a long time trying to figure this out. Then I realized that Lead(IV) Oxide- Which is Lead Dioxide is virtually insoluble in water. Go figure. Your teacher is trying to trick you.