Question

Please help me with my Chemistry questions!

Answer 1

That means balance C2H2+O2->CO2+H2O

Answer 2

LHS:
C:2
H:2
O:2
RHS:
C:1
H:2
O:3

Answer 3

\[\begin{array}{rcl}
C_2H_2+O_2&\rightarrow&CO_2+H_2O\\
C_2H_2+O_2&\rightarrow&2CO_2+H_2O\\
2C_2H_2+2O_2&\rightarrow&4CO_2+2H_2O&\mbox{(because of the O in H2O)}\\
2C_2H_2+5O_2&\rightarrow&4CO_2+2H_2O\\
\end{array}\]

Answer 4

LHS: C:4 H:4 O:10
RHS: C:4 H:4 O:10

Answer 5

C2H2:O2 = 2:5
0.700:X = 2:5

Answer 6

But 0.700:2.5 = 3:10 ...

Answer 7

No, that means X is not 2.5

Answer 8

(0.700 L C2H2) x (5 mol 02 / 1 mol C2H2) = 3.50 L 02
Is that correct?

Answer 9

It's 2 mol instead of 1 mol C2H2

Answer 10

So (0.700 L C2H2) x (5 mol 02 / 2 mol C2H2) = 3.50 L 02

Answer 11

so it's not 3.50L

Answer 12

1.75?

Answer 13

Yep :)

Answer 14

(0.700 L C2H2) x (3 mol CO2 / 2 mol C2H2) = 1.05 L CO2
Is that right for the third one?

Answer 15

It's 4 mol CO2

Answer 16

(0.700 L C2H2) x (4 mol CO2 / 2 mol C2H2) = 1.40 L CO2

Answer 17

Yep

Answer 18

(0.700 L C2H2) x (4 mol H20 / 2 mol C2H2) = 1.40 L H20 vapor

Answer 19

Is that right for the third one?

Answer 20

C'est 2 mol H2O

Answer 21

(0.700 L C2H2) x (2 mol H20 / 2 mol C2H2) = 0.70 L H20 vapor

Answer 22

Oui c'est bon

Answer 23

Thank you so much!

Answer 24

Pas de problème :)
Tu m'as fait appris quelque chose aussi :)

Answer 25

Vous êtes le meilleur!

Answer 26

I'm unsure about the very last one, hence I didn't include my answer.

Answer 27

Je ne suis pas sûr, mais cette page web dit non
http://www.wolframalpha.com/input/?t=crmtb01&f=ob&i=12.8%20L%20of%20helium%20to%20mol

Answer 28

I am going to post it as a new one. hold on.

Answer 29

http://www.wolframalpha.com/input/?i=239%2F%2821%2B273.15%29*%2846%2B273.15%29