my homework is due in a few hours and I am confused. Please... help... quickly!

Question

Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.

 

­­2NaClO3­ --> 2NaCl +3O2

 

How many grams of NaClO3­ were needed to produce 6 grams of O2? Round your answer to the nearest whole number.

Round your answer to the whole number. If your answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element	Molar Mass
Sodium	23
Chlorine	35.5
Copper	63.5
Oxygen	16

help

Answer 1

Good afternoon, Maggie. This problem can be solved using three-step stoichiometry.

Step 1: convert grams of 6 grams of O₂ to moles of O₂

Step 2: convert moles of O₂ to moles of NaClO₃

Step 3: convert moles of NaClO₃ to grams of NaClO₃

_{The problem may be set up as follows:}

(6.0g O₂) X (1 mol O₂ / 32 g) X (2 mol NaClO₃ / 3 mol O₂) X (106.5g / 1 mol NaClO₃) = ___g NaClO₃

I will let you do the calculation...