00:01
So in this question, we are given the math of kclo3, and we're asked to find the mass of oxygen gas.
00:09
So let's write down what we're given, and we're going to write it down in a table format, so we can use stoichiometry to solve this question.
00:20
So we are given the equation, it's balanced, so we don't need to worry about balancing.
00:25
Let's write down information we are given.
00:28
We know 24 grams of kclo3.
00:31
We want to find mass of oxygen.
00:35
We know the molar mass of kclo3 is 122 .55 grams per mole.
00:41
You can calculate this by looking at the atomic masses and adding them up from the periodic table.
00:46
And we know the molar mass of oxygen gas is 32 grams per mole.
00:51
So let's write down our plan for this question.
00:55
First, we are going to find the moles of kclo.
00:58
Then we're going to use mole ratios to find the moles of oxygen gas.
01:10
Then we are going to find the mass of oxygen gas.
01:15
So let's write down our calculations down here.
01:20
So first we are going to use this equation to find the moles of kclo3.
01:26
We're going to write down the information we are given that we're.
01:30
We already know plugged in the mass and molar mass so that you get approximately 0 .196 moles of kcl3...