Question

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Answer 1

The ratio of N2 (nitrogen): 2NH3 (ammonia) is 1:2
If ammonia is 44.8 L, then what is the volume of nitrogen?

Answer 2

22.4? because that is 1:2 of 44.8?

Answer 3

Yes! Remember that this can be done only with gases.

Answer 4

I think it's the last one.

Answer 5

Find the number of glucose oxidised

Answer 6

Number of moles of glucose, I mean

Answer 7

I all ready did all that and got the answer 1,013g, is that incorrect?

Answer 8

Hmm, I am afraid that isn't

Answer 9

isn't what?

Answer 10

1,013 isn't what I get. How many moles of glucose did you get?

Answer 11

let me recalculate

Answer 12

I got 960 but I don't think that's correct either

Answer 13

Why not?

Answer 14

That is correct.

Answer 15

I actually got 1013, after finding 5.27 moles of glucose

Answer 16

How did you reach 960?

Answer 17

Hmm, that may be the problem. Where I live, we consider the molar mass of carbon as 12, oxygen as 16 and carbon as 12 without any memorization of decimals.

Answer 18

and hydrogen as 1*

Answer 19

That was using whole numbers - the decimals were from 950 g / 180 g / mol

Answer 20

for glucose

Answer 21

So I will just stick with 1,013g then @AllTehMaffs?

Answer 22

Oh my, I was mistaken. Sorry for the trouble.

Answer 23

I did 900/180 for unknown reasons.

Answer 24

Ah! I figured I had added something wrong ^_^

Answer 25

1 mole of a gas is 22.4 litres.

Answer 26

The number of moles of H2O is?

Answer 27

2?

Answer 28

Molar mass = 16 + 2 = 18 grams. Mass = 90 g.
One mole is 18 grams
How many moles in 90 grams?

Answer 29

5?

Answer 30

That is correct! The ratio of the coefficients of H2O to O2 is 2:1. How many moles of O2 do we have, then?

Answer 31

1 mole of O2? I'm not sure...

Answer 32

The ratio of coeffs. is 2:1. H2O has 5 moles. How many moles for O2?

Answer 33

I really don't know.. I'm unsure of what I'm meant to do.

Answer 34

2.5?

Answer 35

Yeah, that is right!

Answer 36

2.5 moles of O2. One mole of any gas has 22.4 L at STP.

Answer 37

so 2.5 x 22.4?

Answer 38

Yup.

Answer 39

which would be 56. so the answer is 56.0 L?

Answer 40

Yes.

Answer 41

I think it is 293 g

Answer 42

Yup

Answer 43

I think 13.4

Answer 44

Hmm, not really.

Answer 45

Could you show your work?

Answer 46

1. You did not need the gas equation.
2. STP is at 273K.

Answer 47

Yes!

Answer 48

Thank you!

Answer 49

No problem