2 NO(g) + O2(g) --> 2 NO2(g) If 35 g of NO reacts with 55 g of O2, then how many grams of NO2 will be made? (Answer to two sig figs and without the unit label.)
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2. Balance the following reaction that occurs in acid, using the half-reaction method. I-1(aq) + CrO4-1(aq) --> I2(s) + Cr+3(aq) When this reaction is balanced, there will be (A) H+(aq) and (B) H2O(l) in the final balanced equation. (Enter numbers without the plus sign.) 3. Ca(NO3)2(aq) + K2CO3(aq) --> CaCO3(s) + 2 KNO3(aq) 50 mL of 1.000 M Ca(NO3)2 was reacted with excess potassium carbonate. What mass of calcium carbonate will be made? Repeat your answer to two sig figs...
7. 4 NH3 + 5 O2 ---> 4 NO + 6 H2O If 20.0 g of NH3 reacts with 20.0 g of O2, then how many grams of H2O will be made? (Answer to three sig figs. You don't need to type in the label.)
7. 4 NH3 + 5 O2 ---> 4 NO + 6 H2O If 20.0 g of NH3 reacts with 20.0 g of O2, then how many grams of H2O will be made? (Answer to three sig figs. You don't need to type in the label.
5. Balance the following reaction that occurs in base, using the half-reaction method. NO(g) + MnO4-1(aq) ---> NO3-1(aq) + MnO2(s) When this reaction is balanced, there will be (A) OH-1(aq) and (B) H2O(l) in the final balanced equation. (Enter numbers without the plus sign.) 6. 0.122 grams of an unknown triprotic acid was neutralized with 37.2 mL of a 0.125 M NaOH solution. What is the Molar Mass of the unknown acid? Report the answer to three sig figs and...
Calculate how many moles of NO2 form when each quantity of reactant completely reacts. 2N2O5(g)→4NO2(g)+O2(g) 1. 2.9 mol N2O5 Express your answer using two significant figures. 2. 7.0 mol N2O5 Express your answer using two significant figures. 3. 16.6 g N2O5 Express your answer using three significant figures. 4. 2.39 kg N2O5 Express your answer using three significant figures.
Calculate how many moles of NO2 form when each quantity of reactant completely reacts. 2N2O5(g)→4NO2(g)+O2(g) 15.8 g N2O5 2.85 kg N2O5
5. Benzene reacts with oxygen by the following balanced chemical reaction. 2C6H6(g) + 15 O2(g) → 12 CO2(g) + 6 H2O(g) If 55.0 grams of O2 is reacted with an excess of C6H6 (O2 is the limiting reagent), how many grams of CO2 are produced and how many grams of H2O are produced? (5 points per answer, 10 points total) Grams CO2 Grams H2O cena DOT
1. A 25 grams piece of unknown metal at 80 ºC is dropped into 50 grams of water at 25.0 ºC. The final temperature of the water is 26.16 ºC. What is the specific heat of the unknown metal? [Report answer to two sig figs and do not add the unit label.] 2. Determine the ∆H º for the third reaction; is it exothermic ? ClO(g) + O3(g) --> Cl(g) + 2 O2(g) ∆Hº = -29.90 kJ/mol 2 O3(g)...
Nitrogen dioxide reacts with carbon monoxide to produce nitric oxide as follows: NO2 (9) + CO (9) ► NO (9) + CO2 (g) The reaction is second order in NO2, zeroth order in CO and second order overall. How long (in hours) will it take for NO2 to decompose by 35.8% given the initial concentration was 0.43 M NO2 and CO was in excess. The rate constant for this reaction at 225°C is 2.08 x 10-4 L/mol/s. Report your answer...
calculate how many moles of NO2 form when each quantity of reactant completely reacts. 2N2O5(g)--->4NO2(g)+O2(g) a. 2.5 mol N2O5 b. 6.8 mol N2O5 c. 15.2 g N2O5 d. 2.87 kg N2O5