Question

(a) A sample of cesium metal reacted completely with water, evolving 48.7 mL of dry H2 at 24°C and 774 mmHg. What is the equation for the reaction? Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients. (b) What was the mass of cesium in the sample? I figure out part A but not part B can someone help me?

Answer 1

Use PV = nRT and solve for n = number of moles. Use moles H2 and the equation to solve for the mass of Cs. Here is a worked example of a stoichiometry problem such as this.
http://www.jiskha.com/science/chemistry/stoichiometry.html

Answer 2

thanks