Question

Br2 + 5F2 --> 2BrF5

How many molecules of BrF5 form when 384 g Br2 react with excess F2?

Answer 1

How many moles if 384 g of Br2?

Answer 2

*is

Answer 3

384 g of Br2 is equal to 2.4 moles of Br2

Answer 4

Okay, so in order for Br2 to get to 2.4 moles, that's simply multiplying the entire question by 2.4

Answer 5

So "2BrF5"

that's 2 moles of BrF5

multiply 2 by 2.4 to get your new mole ratio

Answer 6

Why do u multiply it by 2 and not 2.4?

Answer 7

Ohhhhh because of the 2 coefficient.

Answer 8

yes.

Answer 9

2 times 2.4 is equal to 4.8

Answer 10

Alright, now multiply 4.8 by the avogadro number to get it into molecules

Answer 11

So, in questions like these, I will multiply the mole ratio by avo's number?

Answer 12

if it asks for molecules

Answer 13

It is equal to 2.89 * 10^24?

Answer 14

Avo's number is 6.022 * 10^23. After multiplying, I got 2.89 * 10^24

Answer 15

looks good

Answer 16

Thanks! Chemistry is one of the most confusing subjects for me. Haha

Answer 17

yw. anymore questions?

Answer 18

Yes actually, one more.

Answer 19

2NO + O2 --> 2NO2

How many molecules of NO2 can form from 1.11 mol O2 and excess NO?

Answer 20

1.11 mol of o2, just multiply 2no2 by 1.11

Answer 21

and avogadro's number once again

Answer 22

o2=32 grams. 1.11 times 32=35.52

Answer 23

no i mean they already have it in moles so you don't need to convert it to grams

Answer 24

Okay, so "just multiply 2no2", you mean multiply the 1.11 by the molar mass of 2no2?

Answer 25

no by the coefficient

2no2 states there is 2 moles of no2

Answer 26

so, multiply the coefficients by 1.11, and nothing else by it in the equation; then use avo's number?

Answer 27

yep

Answer 28

so it would be 4 times 1.11, since I added both of the coefficients up?

Answer 29

2*1.11 and 2*1.11 would be 4.44 altogether

Answer 30

why would you add the coefficients up xD

Answer 31

q.q I dunt know

Answer 32

2 x 1.1=?

Answer 33

Ohhh, so it would be 2.22NO2.22 now?

Answer 34

it's 2.2 moles of no2

Answer 35

2.2 times avogadro's number and your done

Answer 36

OH wait wait wait, I see what I did.

Answer 37

I multipled the 2 on the right like it was a coefficient, even though it's a subscript, XD

Answer 38

1.32 * 10^24

Answer 39

Thanks, again! Lol

Answer 40

lol yeah np. tag me onto more questions if you got any

Answer 41

Mmkay

Answer 42

Mmkay