Question

can anyone pls help me with stoichiometry questions

Answer 1

Oh dear, it's been a while since I've done chemistry so I don't know if I'll know the answer, but I'll give it a shot. What's the question?

Answer 2

thanks

Answer 3

Ok so, looking at the first question: With the defeat device turned off, the car will undergo the reduction of nitrogen oxide (NO) via selective catalytic reduction by reacting NO, O2, and the urea reserve to produce nitrogen gas (N2), carbon dioxide and water vapour.

Answer 4

The first step would be to organize every reactant and product there into an equation. Here, NO, O2 and urea (CH4N2O) are reactants, and N2, carbon dioxide (CO2), and water vapor (H2O) are the products.

Answer 5

\[NO+O _{2}+CH _{4}N _{2}O \rightarrow N _{2}+CO _{2}+H _{2}O\]

Answer 6

This is what it looks like right now. The next step would be to balance the equation so that the same number of each element are on both sides.

Answer 7

There's a few problems with the equation that I just wrote out here. There's 3 nitrogen molecules on the left side and only 2 on the right. There's also 4 oxygen molecules on the left and 3 on the right. Then theres 4 hydrogen molecules on the left and 2 on the right. Carbon is fine.

Answer 8

So you will need to multiply one side, or perhaps both, so that they end up with equal amounts of their elements.

Answer 9

ok, i can do that thanks

Answer 10

Are there any other questions on here you're confused about?

Answer 11

yea

Answer 12

Okay, which ones?

Answer 13

c and e

Answer 14

Alright. So question c builds off of the answer you got from question b. What answer did you get from question b?

Answer 15

can you wait for a while sorry am still solving,

Answer 16

Oh yeah don't worry about it, take your time.

Answer 17

ok

Answer 18

No, I completely understand. I took AP chemistry a few years ago and it was a nightmare lol

Answer 19

it took me a while to balance the equation myself, so I understand the frustration

Answer 20

i have been trying with this equation but it cant work
NO+O2+CH4N2O→N2+CO2+H2O

Answer 21

unless i dont put the no
2CH4N2O + 3O2 → 2N2 + 2CO2 + 4H2O

Answer 22

After a while this was what I got

2NO + 2O2 + 2CH4N2O → 3N2 + 2CO2 + 4H2O

Answer 23

There isn't really the ideal way to balance equations, what I do to keep track of which ones are balanced is I'll write their symbol and a little checkmark next to them. Sometimes you have to "unbalance" an equation to balance it again, if that makes sense.

Answer 24

ok will try again

Answer 25

sorry for being late
2NO+O2+2CH4N2O→3N2+2CO2+4H2O

Answer 26

That's almost right. There's 8 oxygen molecules on the right and 6 on the left.

Answer 27

no it is 6 6
2 o from n
2 from o
2 from ch 4n2o

Answer 28

On the right theres 2CO2 and 4H2O. That's four O molecules from 2CO2 and four O moluecules from 4H2O

Answer 29

ok i have seen it thanks am gonna change it

Answer 30

3NO+2O2+2CH4N2O→3N2+2CO2+4H2O

Answer 31

Yep! That's right.

Answer 32

sorry i fell asleep

Answer 33

is dis the question

Answer 34

yes