3. Chemical Reactions

Consider the reaction 2HBr(g) → H2(g) + Br2(g). In the first 20.0 s of this reaction, the concentration of HBr dropped from 0.580 M to 0.534 M. Calculate the average rate of the reaction during this time interval in M/s.

Consider the unbalanced equation: Na + Cl₂ → NaCl. What mass of NaCl can be produced from 25.0g of Cl₂ and excess Na? Solve using dimensional analysis.

How many grams of Mg(OH)2 are required to completely neutralize 20 mL of 0.1 M HCl?

Determine the number of grams of H2 formed when 250.0 mL of 0.743 M HCl solution reacts with 3.41 x 10^23 atoms of Fe according to the following reaction: 2 HCl(aq) + Fe(s) → H2(g) + FeCl2(aq).

Determine the theoretical yield of H2S (in moles) if 48 mol Al2S3 and 48 mol H2O are reacted according to the following balanced reaction: Al2S3(s) + 6 H2O(l) → 2 Al(OH)3(s) + 3 H2S(g).

Which of the following is the balanced chemical equation for the formation of calcium nitrate, Ca(NO3)2(s), from its respective elements in their standard states?

In stoichiometry, is every chemical reaction classified as either endothermic or exothermic based on the heat of reaction?

What is the mass of Fe₂O₃ required to produce 930 kg of iron (Fe) in the reaction: Fe₂O₃ + 3CO → 2Fe + 3CO₂?

For the reaction 3A + 2B + C → 2D, if 5.7 mol of A, 3.2 mol of B, and 2.5 mol of C are mixed, which reactant is the limiting reactant?

For the reaction 4Al(s) + 3O₂(g) → 2Al₂O₃(s), if you start with 8 moles of Al and 6 moles of O₂, what is the limiting reactant?

Given the balanced equation N2(g) + 3 H2(g) → 2 NH3(g), what is the rate of reaction with respect to [NH3] if the rate of disappearance of H2 is 0.6 mol/L·s?

According to the reaction 2 LiOH + FeCl2 → 2 LiCl + Fe(OH)2, how many moles of Fe(OH)2 can be formed from 175.0 mL of 0.227 M LiOH solution?

How many grams of CaCl2 are formed when 15.00 mL of 0.00237 M Ca(OH)2 reacts with excess Cl2 gas according to the reaction: 2 Ca(OH)2(aq) + 2 Cl2(g) → Ca(OCl)2(aq) + CaCl2(s) + 2 H2O(l)?

How many grams of KCl(s) are produced from the thermal decomposition of KClO3(s) when 25.0 mL of O2(g) is produced at 25°C and 1.00 atm pressure according to the chemical equation: 2 KClO3(s) → 2 KCl(s) + 3 O2(g)?

How many grams of Li3N can be formed from 1.75 moles of Li based on the following balanced chemical equation of the reaction? Assume an excess of nitrogen. 6 Li(s) + N2(g) → 2 Li3N(s)