i need help with Stoichiometry work ASAP

Question

Given the following equation: 2 K + Cl2 ---> 2 KCl

How many moles of KCl are produced from 10.00 moles of K and excess Cl2. ?

Given the following equation: Na2O + H2O ---> 2 NaOH

How many moles of NaOH are produced from 4.80 moles of Na2O? 

Answer 1

Hello Bob- I'd be happy to help you with your question!

I'll take you through the steps to solve the first equation, and to solve the second you'll use the same procedure.

2 K + Cl2 ---> 2 KCl

The reaction is already balanced. If you start with 10.0 moles K, use the molar ratio to find the moles of KCl. The coefficient of K is 2, and of KCl is also 2.

10.0 mol K x 2 mol K = 10.0 mol KCl

2 mol KCl

The second question is solved the same way, except you start with 4.80 mol Na₂O, and the coefficients

Na2O + H2O ---> 2 NaOH

This reaction is also balanced for you, so there is 1 mole of Na₂O for every 2 moles of NaOH. Use this ratio to solve.

Please message or comment if you need more help!