The kinetic energy of a 7.3 kg steel ball traveling at 18.0 m/s is __________ J.

An unknown compound is determined by elemental analysis to have the following composition: Element Mass(%) Cs 66.3 Cl 17.7 O 16.0   What is the compound’s empirical formula?

The reaction NH3(aq) + H2O(l) → OH-(aq) + NH4+(aq) is an example of _____?

What is the correct name for the salt formed between calcium hydroxide and hydrochloric acid?

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