Question

If 59.3 grams of potassium chlorate decomposes, how many grams of oxygen gas can be produced?

2 KClO3 → 2 KCl + 3 O2

Answer 1

@ganeshie8

Answer 2

My options are
15.5 g O2

23.2 g O2

31.0 g O2

46.4 g O2

Answer 3

start by finding the molar mass of KCLO3 :

K : 39.1
Cl : 35.45
O3 : 16*3 = 48
-----------------
KCLO3 : 39.1 + 35.45 + 48 = 122.55 g/mol

Answer 4

tell me, how many mols are present in 59.3 grams of KCLO3 ?

Answer 5

2.1

Answer 6

Nope.

122.55 g has 1 mol
how can 59.3g be more than 1 mol ?

Answer 7

.-. 122.55/59.3..... 59.3+59.3=118.6

Answer 8

118 fits into 122

Answer 9

\[\large \text{59.3 g} = \text{59.3 g} \times \dfrac{\text{1 mol }}{\text{122.55 g}} = 0.484 ~\text{mol}\]

Answer 10

.-. Wtf.... Where did that just come from

Answer 11

`KCLO3 : 39.1 + 35.45 + 48 = 122.55 g/mol`

1 mol = 122.55 g

Answer 12

? mol = 59.3 g

Answer 13

thats the question.

Answer 14

lets try this :

1 mol = 122.55 g

so, 1g = 1/122.55 mol right ?

Answer 15

Yus

Answer 16

finally a yes xD

1g = 1/122.55 mol

multiply both sides by 59.3, what do u get ?

Answer 17

0.484

Answer 18

1g = 1/122.55 mol


59.3 g = 59.3/122.55 mol
= 0.484 mol

Answer 19

that means you have `0.484 mol of KCLO3 ` in the reaction, lets see how much O2 this produces

Answer 20

And how do I do that .-.

Answer 21

2 KClO3 → 2 KCl + 3 O2

KClO3 → KCl + 3/2 O2

Answer 22

multiply through by 0.484

Answer 23

.-. Multiply what through

Answer 24

0.484KClO3 → 0.484 KCl + `0.484*3/2` O2

Answer 25

So it produces 0.484*3/2 mol of O2

Answer 26

convert mols to grams, and you're done!

Answer 27

0.484*3/2 mol of O2 = How many grams ?

Answer 28

0.726 c:

Answer 29

yes

0.726 mol of O2 = How many grams ?

Answer 30

whats the molar mass of O2 ?

Answer 31

.-. I have no idea

Answer 32

google

Answer 33

wolfram
http://www.wolframalpha.com/input/?i=molar+mass+O2

Answer 34

N c: just use your stuff from up top. 16*2=32

Answer 35

*no

Answer 36

that works !
1 mol of O2 = 32 grams

Answer 37

0.726 mol of O2 = How many grams ?

Answer 38

1/32=0.726/?
232.32/1

Answer 39

I'm guessing mines wrong and the correct answer is 23.2

Answer 40

tell me this :

if 1 coconut weighs 1 kg
then half coconut weighs how many kg ?

Answer 41

That's the great thing about multiple choice right there XD

Answer 42

23.2 is correct !

Answer 43

.5kg....

Answer 44

how did u get .5kg ?

Answer 45

you multiplied the original weight by 1/2 right ?

Answer 46

By halfing it .-.

Answer 47

Well I don't really need to go through the whole process of 1*1/2=.5

Answer 48

But yeah I guess what your sayin

Answer 49

then tell me this, how much 0.235 of coconut weighs ?

Answer 50

how much \(\large \pi \) of coconut(s) weigh ?

Answer 51

how much 10 coconuts weigh ?

Answer 52

this is essentially a multiplication problem, not a division problem. okay ?

Answer 53

Yeah it's cross multiplication that's what I did

Answer 54

okay nice :) anything is fine as long as it makes sense...