Urea (CH,N,0) is a common fertilizer that is synthesized by the reaction of ammonia (NH3) with carbon dioxide: 2 NH3(aq) + CO2(ag)– CH,N;O(ag) + H,0(1) In an industrial synthesis of urea, a chemist combines 136.4 kg of ammonia with 211.4 kg of carbon dioxide and obtains 168.4 kg of urea. Determine the limiting reactant, theoretical yield of urea, and percent yield for the reaction.

Dimethyl ether, a useful organic solvent, is prepared in two steps. In the first step, carbon dioxide and hydrogen react to form methanol and water: CO₂(g) + 3H₂(g) → CH₂OH(/) + H₂O(1) In the second step, methanol reacts to form dimethyl ether and water: 2 CH3OH(1) > CH3OCH3(9) + H₂O(1) ΔΗ = 8. kJ Calculate the net change in enthalpy for the formation of one mole of dimethyl ether from carbon dioxide and hydrogen from these reactions. Round your answer to the nearest kJ. ☐ kJ X AH-131. kJ

Copper (II) sulfate (CuSO4) can be used to control algae growth. Aqueous CuSO4 solutions that come in contact with the surface of galvanized (zinc-plated) steel pails undergo the following reaction: CuSO4(aq) + Zn(s) ---> Cu(s)+ ZnSO4 (aq) How many grams of zinc would react with 454 g (1 lb) of CuSO4 (159.61 g/mol) ?

(4) for the reaction : 2 NaHCO3 → Na₂CO₂ + H₂O + CO₂ Find the mass of Sodium Carbmate that reacted from 1.56g of heated Sodium Hydrogen Carbonate

6.24 Ethanol, used in alcoholic beverages, can be produced by the fermentation of sucrose, which is found in sugar cane and other plants. The balanced equation for the fermentation process is C12H„0,(s) + H,0(1) – (a) What mass of ethanol, C,H,OH, would be produced when 2.50 g sucrose reacts by this process? (b) What mass of CO, would also be produced? 4C,H,OH() + 4CO,(g)

One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200.mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution like this: FeCl3 (aq) + 3AgNO3 (aq) →3AgCl (s) + (FeNO3)3 (aq) The chemist adds 48.0mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 7.5mg of silver chloride. Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits.

When Alka-Seltzer® tablets are dissolved in water, a gas is produced due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (C6H8O7) as indicated in the following reaction: 3 NaHCO3 (aq) + C6H8O7 (aq) 3 CO2 (g) + 3 H2O (l) + Na3C6H5O7 (aq) Following some experimental testing, two blends have been proposed for the tablet composition, namely: Blend 1: 6.00 gram of NaHCO3 mixed with 6.00 gram of C6H8O7 Blend 2: 6.00 gram of NaHCO3 mixed with 2.00 gram of C6H8O7 i) Determine the amount (in mole) of carbon dioxide gas produced from each of these blends, and so identify the blend that produces the most carbon dioxide. ii) What mass (in grams) of carbon dioxide gas would be produced using the blend that produces the most carbon dioxide?

In a particular experiment 0.0039 moles of AgNO3 is added to 0.001875 NH4Cl and 0.156g of AgCl are recovered. What is the percent yield? AgNO3(aq) + NH4Cl(aq) --> AgCl(s) + NH4NO3(aq)

Which of the following correctly expressed the balanced equation for the following word equation:

Kindly refer to the attached picture