Consider the reaction: 3Cu +2H;PO(aq) →Cu; (PO,)2cag) +3H2(3) What minimum volume of 3.50 MH 3 PO 4 is required to produce 10.0 L of H 2 at STP? 117.6 L 8.50 x 10-2 L 1.91 x 10-1 L 523 L
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A: Mass of CH4 = 6.50 g Molar mass of CH4 = 16 g mol-1
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A: Every reaction takes place according to the stoichiometric ratio.
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A: Given, The amount of PBr3 = 81.2 g The molecular weight of PBr3 = 270.7 g/mol.
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- Baking soda (sodium hydrogen carbonate) is used as a leavening agent on making bread according to the reaction below. Calculate the volume of CO2 (g) formed at 200°C and a pressure of 740 mm Hg if the baker used 5.50 g of baking soda. (Molar Mass of NaHCO3 is 84.0071 g/mol) Enter answer without unit. NaHCO3 (s) + HCl (aq) ---> H2O (l) + CO2 (g) + NaCl (aq)H2S (g) can be generated by the following reaction: 2 HCl(aq) + FeS(s) → FeCl2(aq) + H2S(g) What volume (at STP) of H2S gas can be generated from 20.4 mL of 0.335 M HCl and an excess of FeS? V = ___ mLWhat volume of CO2(g) at STP is produced if 1.42 L of 0.0036 M HCl reacts with an excess of CaCO3 in the following reaction: CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)
- A baker uses baking soda as the leavening agentfor his pumpkin-bread recipe. The baking soda decomposesaccording to two possible reactions.2NaHCO 3(s) → Na 2C O 3(s) + H 2O(l) + CO 2(g)NaHC O 3 (s) + H + (aq) → H 2 O(l) + C O 2 (g) + Na+(aq)Calculate the volume of C O 2 that forms per gram ofNaHC O 3 by each reaction process. Assume the reactionstake place at 210°C and 0.985 atm.15. Na2SO3(aq) + 2HCl(aq) 2NaCl(aq) + H2O(l) + 2SO2(g) a) Write the net ionic equation for this reaction. b) What is the pressure (in atm) due to the sulfur dioxide gas only, inside a 1.50 L reaction flask at 23 ̊ C if 3.24 g of sodium sulfite is consumed in the reaction? Assume 100% yield and vapor pressure of water is 21.3 torr. c) What volume of 0.850 M hydrochloric acid in mL, must be used to recover 2.12g of water?If 20.0 g of CaCO3 is placed in a 10.0 L reaction vessel at 950oC, what percent of CaCO3 remains in the reaction vessel when the system reaches equilibrium. Show work to support your answer. Please provide only typed answer solution no handwritten solution needed
- Activity 1.3: Calculate the following different ways of expressing concentration of solutions. If 100 L of a gas mixture over a metropolitan area contains 0.006 Oxygen L, how many ppm of CO is present? A solution is prepared by dissolving 10g of glucose, C6H12O6 in 100g of water. What is the percentage by mass of glucose in the solution? What is the molarity of a solution made when 32.7 g of NaOH are dissolved to make 445 mL of solution? As an example consider 5 g sugar dissolved in 20 g of water. What is the percentage by volume concentration of sugar in this solution? What is the molarity of a solution containing 0.46 mole of solute in 2.0 kg water?2.00 mol of NOBr dissociates 9.4 % in a 1.0 L vessel. Calculate Kc. 2NOBr (g) ↔ 2NO(g) + Br2(g)Consider the reaction 2 N2O (g) = 2 N2 (g) + O2 (g) where Kc = 0.24 at 25 °C. If 0.12 M N2O (g), 0.21 M N2 (g) and 0.10 M O2 (g) are initially present in a 1.0 L flask at 25 °C, what change in concentrations (if any) will occur in time? (Choose one option only). Options: a. [N2O] and [N2] will remain unchanged. b. [N2O] will decrease and [N2] will increase. c. [N2O] will increase and [N2] will increase. d. [N2O] will increase and [N2] will decrease. e. [N2O] will decrease and [N2] will decrease.
- Macmillan Learning The balanced equation for the neutralization reaction of aqueous H₂SO, with aqueous KOH is shown. H₂SO₂ (aq) + 2 KOH(aq) → 2H₂O(1) + K₂SO₂ (aq) - What volume of 0.360 M KOH is needed to react completely with 12.9 mL of 0.160 M H₂SO₂? volume: ml.What volume of 0.10 moldm-3 sulphuric acid would be required to neutralise a mixture of 1.06 g of anhydrous sodium carbonate and 4.00 g of sodium hydroxide? (H2SO4 + 2NaOH ---> Na2SO4 + 2H2O) and (H2SO4 + Na2CO3 ® ---> Na2SO4+ H2O + CO2)Dinitrogen pentoxide forms from its elements by the following balanced chemical equation: 4 NO2 (g) + O2 (g) <--> 2 N2O5 (g) What will be the value of Q if the concentrations are as follows: NO2 = 0.308 M O2 = 0.600 M N2O5 = 0.212 M. ( answer in 3 significant figures)