Scelta multiplaIn the reaction 2C2H6 + 7O2 → 4CO2 + 6H2O, what mass of C2H6 is required to produce 280.0 g of CO2?160views
Scelta multiplaGiven that the reaction between sodium bicarbonate (NaHCO_3) and sulfuric acid (H_2SO_4) is: 2 NaHCO_3 + H_2SO_4 → Na_2SO_4 + 2 CO_2 + 2 H_2O, how many moles of NaHCO_3 are required to completely neutralize 0.8 mL of H_2SO_4 (density = 1.84 g/mL, molar mass = 98.08 g/mol) at STP?134views
Scelta multiplaIn the reaction 2SO2 + O2 → 2SO3 followed by SO3 + H2O → H2SO4, if 8.0 mol of SO2 and excess O2 and H2O are reacted, what is the theoretical yield of H2SO4 (in moles)?177views
Scelta multiplaIn the reaction 2 C2H6O + 2 K2Cr2O7 + 8 H2SO4 → 2 Cr2(SO4)3 + 2 K2SO4 + 3 CH3COOH + 11 H2O, if the rate of appearance of Cr2(SO4)3 is 1.24 mol/min, what is the rate of disappearance of C2H6O?1170views
Scelta multiplaIn the reaction between NaOH and H2SO4, how many moles of NaOH are required to completely react with 1 mole of H2SO4 according to the balanced chemical equation?239views
Scelta multiplaIf a chemical reaction starts with 20 g of reactants and proceeds to completion with no side reactions, what is the maximum mass of products that can be formed according to the law of conservation of mass?163views
Scelta multiplaIn the reaction 4 Fe + 3 O_2 → 2 Fe_2O_3, how many atoms of iron (Fe) are required to react with 3 molecules of oxygen (O_2) to form 2 molecules of iron(III) oxide (Fe_2O_3)?120views
Scelta multiplaWhen 20 mL of 0.80 M HCl is mixed with 30 mL of 0.40 M NaOH, what mass of water (in grams) is formed from the neutralization reaction?124views
Scelta multiplaIf 5.0 moles of C_3H_8 react completely with excess O_2 according to the equation C_3H_8 + 5 O_2 ightarrow 3 CO_2 + 4 H_2O, how many moles of CO_2 are produced?122views
Scelta multiplaIf you have 63.5 mol of P_4O_{10}, how many moles of phosphorus atoms (P) are present?148views
Scelta multiplaGiven the reaction PbO + NaCl + H2O → Pb(OH)Cl + NaOH, how many grams of PbO and NaCl are required to produce 10.0 g of Pb(OH)Cl, assuming excess H2O and complete reaction?140views
Scelta multiplaA sample of 35.0 g of magnesium (Mg) undergoes complete oxidation according to the reaction: 2 Mg + O_2 → 2 MgO. What mass of magnesium oxide (MgO) is produced?147views
Scelta multiplaIn the reaction 2 H_2 + O_2 → 2 H_2O, how many moles of water (H_2O) are produced from 13.35 mol of oxygen (O_2)?130views
Scelta multiplaWhat volume (in L) of 1.10 M FeCl_3 solution is required to obtain 0.700 moles of Cl^- ions?142views