im stuck on this question:

Octane (C8H18) burns in oxygen to produce carbon dioxide gas and water vapour.
(i) Write a balanced chemical equation for this process.
(ii) Calculate the volume of carbon dioxide produced at 25 °C and a pressure of
1.01×105 Pa when 9.85 g of octane is used up in the combustion reaction.
(R = 8.314 J K-1 mol-1; Atomic masses: C = 12.01, H = 1.01, O = 15.99)

i got the balenced equation (C8H18----> 8CO2 +9H2O)
and the second part i was using the formula pV=nRT but it gives you grams of octane and asks for the volume of CO2...im totally confused. can anyone help me?

2007-08-25 08:35:14 · 7 answers · asked by Anonymous in Chemistry

0 ⤊

Difference Quotient Help!?

here it is

f(x)=(x+5)/(x+3)

find and simplify for [f(x)-f(3)]/(x-3)

please help and show step by step instructions! thank you!

2007-08-25 08:33:03 · 6 answers · asked by fr3shfr0st 1 in Mathematics

0 ⤊

Geometry problem?

Lines p and q are parallel. The slope of p is 5 and the slope of q is 10/v. What is v?

What is the equation of the line through points (-3, 2) and
(-4, 5)?

2007-08-25 08:26:37 · 8 answers · asked by Anonymous in Mathematics

2 ⤊

where does graphite come from?

2007-08-25 08:26:06 · 8 answers · asked by p_doell 5 in Earth Sciences & Geology

0 ⤊

Hi, I'm RVing in southern Or and I'm trying to set my compass. What degree east does the sun come up

2007-08-25 08:25:09 · 1 answers · asked by Donald B 1 in Astronomy & Space

0 ⤊

When an object is moving at constant acceleration...?

When an object is moving at constant acceleration, is it accelerating or is it moving with a same speed? Why?

2007-08-25 08:23:08 · 8 answers · asked by Anonymous in Physics

2 ⤊

x/a-5=b solve for x and find any restrictions?

I asked this question earlier, but it got deleted. Please explain step by step. Thanks a mill.

2007-08-25 08:22:07 · 4 answers · asked by ♫MizzUnderstood♫ 3 in Mathematics

1 ⤊

my water is cloudy?

wats wrong the looks lik milk in my tank wat can i use in that to help

2007-08-25 08:17:30 · 11 answers · asked by josh h 2 in Zoology

1 ⤊

If the planet earth were to pass to close to the sun and burn would there be any signs of us being here?

2007-08-25 08:16:27 · 9 answers · asked by RICARDO RICARDO 1 in Astronomy & Space

0 ⤊

how to pour out water(liquid) without being sprayed?

i pour out water at the length of 3 meters, after a moment it divides into small drops, how
can i make it move only in one direction?
http://www.aquatic-show.com/site/More-photos-of-Aqua-graphic-44.html

2007-08-25 08:16:08 · 4 answers · asked by majidf_elc 1 in Physics

1 ⤊

solve by completing the square.9x^2 - 6x - 35 = 0?

2007-08-25 08:15:59 · 3 answers · asked by Li 1 in Mathematics

0 ⤊

Geometry equation help?

What is the equation of the line through points
(-3, 2) and (-4, 5)?

What is the equation of the line through points
(2, 5) and (5, 7)?

What is the equation of the line through point (3, 2) and parallel to a line with slope 2?

2007-08-25 08:12:15 · 1 answers · asked by Anonymous in Mathematics

0 ⤊

|3n-6| = 12?

|3n-6|= 12

3n-6=12
3n= 18
n= 6

or

3n+6=12
3n= 6
n= 2

Which is it? Or is it both?

2007-08-25 08:11:25 · 4 answers · asked by Anonymous in Mathematics

1 ⤊

what is there in pluto?

2007-08-25 08:09:59 · 4 answers · asked by Anonymous in Astronomy & Space

4 ⤊

how many stars are there in the sky??

2007-08-25 08:07:56 · 14 answers · asked by helen. 2 in Astronomy & Space

1 ⤊

How to Measure Constant and Average Thrust and Total Impulse?

If a built a rocket which ways 10Kg with Propellant and the Propelllant ways 9Kg and It Burn for 2min at a rate of 75g/sec and most importantly tell me

HOW YOU WORKED THAT OUT.

And i dont want it that compilicated because then i will not understand the equation and the answer i just want it normal which you will be sure i can uderstand.

2007-08-25 07:55:47 · 1 answers · asked by Hamza 1 in Physics

2 ⤊

What if a deep space probe slammed into the celestial sphere?

What if Aristotle and Ptolemy were right? What if the Voyagers 1 and 2 crash into the celestial sphere? How would that change our space program and our view of our place in the universe?

2007-08-25 07:53:12 · 5 answers · asked by Link 5 in Astronomy & Space

0 ⤊

how can i freeze time?

how can i freeze time so i can get a little freedom.

2007-08-25 07:45:59 · 7 answers · asked by Anonymous in Physics

1 ⤊

About Science?

Why does an ice skater move across the ice faster than a runner on an asphalt track?

2007-08-25 07:43:03 · 4 answers · asked by dogiekitten 1 in Physics

3 ⤊

what is 70/125 in its simplest form?

2007-08-25 07:41:23 · 4 answers · asked by Mashe M 1 in Mathematics

2 ⤊

what is 19/125 in simplest form?

2007-08-25 07:33:33 · 5 answers · asked by Mashe M 1 in Mathematics

1 ⤊

4w-2(1w)=-38?

Please help and explain. My friend DUMBNutGobbler wasted all his daily questions asking for help, and I can't help him either. So now I'm asking.

2007-08-25 07:29:51 · 6 answers · asked by ♫MizzUnderstood♫ 3 in Mathematics

0 ⤊

What are the effects of the fertilizer on tomato plants?

thank you very much

2007-08-25 07:28:27 · 2 answers · asked by ? 3 in Biology

1 ⤊

How does force figure into the photon in QM theory? Is it as per Newton's F=ma or what?

If its F=ma then what is the mass of the photon?

2007-08-25 07:25:29 · 5 answers · asked by jim m 5 in Physics

0 ⤊

Science project?

Hey everyone! I'm doing a project on the four earth science branches (astronomy, geology, meteorology, and oceanography) and I'm trying to make it interesting. Does anyone know any interesting facts about any of these four subjects that I could add to my presentation?
I appreciate any help!

Thanks and God Bless

2007-08-25 07:19:18 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2 ⤊

What was the distance in kilometers between Paris and London when Napolean was emperor?

2007-08-25 07:12:56 · 4 answers · asked by Babar R 1 in Geography

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