Question

Question:

Answer 1

How many grams of NaOH can be formed when 43.0 grams of Na2O react with 27.0 grams of H2O? (1 point)

Na2O + H2O yields NaOH

Be sure to balance the equation.

13.9 grams
18.0 grams
27.0 grams
55.5 grams



How many grams of H2 are needed to react completely with 44.1 grams of C? (1 point)

C + H2 yields CH4

Be sure to balance the equation.

7.40 grams
14.7 grams
88.2 grams
132 grams

Answer 2

@taramgrant0543664

Answer 3

So lets start with the first one and balance it, are you able to do that?

Answer 4

yes Na2O + H2O = 2 NaOH

Answer 5

Perfect now we need to determine which of the reactants is the limiting reagent to do this we take the mass and divide by the solar mass:
43g Na2O * (1mol Na2O/61.98g/mol)=?
27g H2O * (1mol H2O/18.02g/mol)=?

Answer 6

um..having trouble with that part

Answer 7

Are you able to elaborate which part you are having problems with?

Answer 8

43g Na2O * (1mol Na2O/61.98g/mol)=?
27g H2O * (1mol H2O/18.02g/mol)=?

:)

Answer 9

Ok so the first one there we will get 0.694mol of Na2O and 1.50mol of H20 so the limiting reagent will be the Na2O

Answer 10

Knowing that the Na2O is the limiting reagent we can use this to determine the yield of NaOH so:
0.694mol Na2O * (2mol NaOH/1mol Na2O) * (39.99g/mol /1mol NaOH) = ? g NaOH

Answer 11

I think i got18.0 grams

Answer 12

wait idk :/

Answer 13

Sorry I messed something up one sec

Answer 14

Wait no I was looking at the wrong options for a sec lol when I did the math I got the 55.5

Answer 15

ohhh okay I think i messed up with a number too :) but 55.5 i agree too

Answer 16

Awesome so lets do the second one, do you want to balance it?

Answer 17

C + 2 H2 = CH4

Answer 18

Perfect! So for this one we don't need to find the limiting reagent.
We can start with:
44.1g C * (1mol C/ 12.01g/mol C) * (2mol H2/ 1molC) * (2.02g/mol H2/ 1mol H2)= ?gH2

Answer 19

7.40 grams?

Answer 20

You missed multiplying it by another two somewhere in there I believe

Answer 21

I might have multipled by the wrong thing..132 grams i believe

Answer 22

When I went through it I ended with 14.8 since I carried all decimals without decimal carrying I got 14.7

Answer 23

lol i'm sorry i made a simple error hahah :)

Answer 24

That is no problem lol happens to everyone!

Answer 25

:D