Use the data in the following table to calculate the ΔHrxn of the following reaction: CO2(g) + H2(g) → CO(g) + H2O(g) substance ΔH°f (kJ/mol) CO2(g) −393.51 H2(g) 0 CO(g) −110.52 H2O(g) −241.82

How many mL of a 35 mass% stock solution of H2O2 are required to prepare 250 mL of 3.0 mass% H2O2 solution?

Classify the following type of reaction: Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g).

A 50.0 g sample of iridium contains how many iridium atoms?

An unknown compound is determined by elemental analysis to have the following composition: Element Mass(%) Rb 40.0 Br 37.4 O 22.5 What is the compound’s empirical formula?

A 50.0 g piece of unknown metal at 53.6 °C is placed in 100 g of water at 25.0 °C contained in a coffee-cup calorimeter. The metal and water come to the same temperature at 23.6 °C. According to the following table, what is the likely identity of the metal? metal specific heat capacity (J/gK) Mg 1.020 Fe 0.444 Zn 0.390 Ag 0.240 Pb 0.160

What salt is formed between lithium hydroxide and hydrobromic acid?

Which of the following people sounds most like he has an anxious attachment style?

Which of the following statements regarding marital satisfaction is false?

Which of the following is not one of the four types of similarity most relevant to predicting interpersonal attraction?