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When this chemical equation, HCl + O2 → H2O + Cl2, is balanced, the sum of the coefficients is
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Which scientific law requires that chemical equations be balanced?
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CHEMISTRY ch. 4-5
| Question | Answer |
|---|---|
| When this chemical equation, HCl + O2 → H2O + Cl2, is balanced, the sum of the coefficients is | 9 |
| Which scientific law requires that chemical equations be balanced? | law of conservation of mass |
| Which scientific law states that the number and type of each atom in the reactants must equal the number and type of each atom in the products? | law of conservation of mass |
| Consider this equation: Fe2O3 + C → Fe + CO. When this equation is balanced, what are the coefficients (from left to right)? | 1, 3, 2, 3 |
| Consider the reaction, C7H16 + O2 → CO2 + H2O. When this equation is balanced, what are the coefficients (from left to right)? | 1, 11, 7, 8 |
| Consider the reaction, CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g). If 15 moles of CH4 and 25 moles of O2 react, how many moles of H2O(g) will form? | 25 mol |
| Consider the reaction, CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g). If 15 moles of CH4 and 25 moles of O2 react, how many moles of CH4 remain after the reaction is complete? | 2 |
| Consider the reaction, N2(g) + 3 H2(g) → 2 NH3(g). If 33 moles of H2 react, how many grams of NH3 form? | 370g |
| Consider the reaction, N2(g) + 3 H2(g) → 2 NH3(g). If 33 moles of H2 react, how many moles of NH3 form? | 22 |
| Suppose the theoretical yield of a reaction is 20.0 g but the actual yield is 15.0 g. What is the percent yield (based on grams)? | 75.0% |
| What's the net ionic equation for the reaction of Na2CO3(aq) and HCl(aq)? | 2H+(aq) + CO32-(aq) → CO2(g) + H2O(l) |
| Which decomposition reaction is not correct? | H2CO3(aq) → CO3(g) + H2(g) |
| What's the final molarity of a solution when 75 mL of a 1.2 M solution are diluted to 225 mL? | 0.40 M |
| Consider the reaction, Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s). Which statement below is true? (zinc is above copper in the activity series) | An observer would see copper deposit on the zinc. |
| What's the concentration of a solution that contains 3.3 mol of NaCl in 1.1 L of solution? | 3.0 M |
| How many grams of sodium carbonate are required to make 2.5 L of a 1.0 M solution? | 270 g |
| What is the complete, balanced equation for the reaction between HNO3(aq) and Ca(OH)2(aq)? | 2 HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2 H2O(l) |
| What is the net ionic equation for the reaction between HNO3(aq) and Ca(OH)2(aq)? | H+(aq) + OH-(aq) → H2O(l) |
| What is the oxidation number of sulfur in H2SO4? | +6 |
| What is one product of this reaction, NH4Cl(aq) + Pb(NO3)2(aq)? | PbCl2(s) |
| What is the net ionic equation for this reaction, AgCH3COO(aq) + MgBr2(aq)? | Ag+(aq) + Br-(aq) → AgBr(s) |
| What is the net ionic equation for the reaction, NaBr(aq) + LiCl(aq)? | Na+(aq) + Br-(aq) → NaBr(s) |
| Consider the reaction, 2 H2(g) + O2(g) → 2 H2O(g). Which statement below is true? | Hydrogen oxidized |
| From the following statements below, select the true statement. | Oxidation-reduction reactions contain two reactions: an oxidation reaction and a reduction reaction. |
| What is the net ionic equation for the reaction, Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)? | Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) |
| Consider this reaction, 3 CaCl2(aq) + Al2(SO4)3(aq) → 3 CaSO4(aq) + 2 AlCl3(s). How many milliliters of 0.75 M CaCl2(aq) are required to react completely with 35 mL of 0.50 M Al2(SO4)3(aq)? | 70. mL |
| Consider the reaction, CaCl2(aq) + 2AgNO3(aq) → 2AgCl(s) + Ca(NO3)2(aq). If 25 mL of 1.0 M AgNO3(aq) reacted, how many grams of AgCl would be produced? | 3.6 g |
| Solutions are | homogeneous mixtures |
Created by:
tbmartin2