A41-g sample of potassium completely reacts with chlorine to form 78 g of potassium chloride. how many grams of chlorine must have reacted?

37.275g must react

Explanation:

Step 1: Balance the reaction

The reaction is as follow:

2 K + Cl2> 2KCl

This means that for 2 moles K we have 1 mole Cl2 ( and 2 moles KCl)

Step 2: Calculate moles

Moles of potassium:  moles = mass / Molar mass

Moles of potassium = 41g / 39.1g/mol  

Moles of potassium = 1.05 moles

for each 2 moles potassium we have 1 mole Cl2 ( and 2 moles KCl)

Moles of Chlorine : 1.05 / 2 = 0.525 moles ( and 1.05 moles of KCl)

Step 3: Calculate mass of chlorine

mass chlorine = moles x Molar mass  = 0.525 x 35.5 x 2

       = 37.275g Chlorine

stupid i wont let you get a chance

explanation:

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.