Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide according to the following equation: 2NH3(g) + CO2(g) → (NH2)2CO(aq) + H2O(l). In one experiment, 637.2 g of NH3 is allowed to react with 1142 g of CO2. Which of the two reactants is the limiting reagent?
Calculate the massof (NH2)2CO that could theoretically be formed by this reaction.​

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize