Science & Mathematics - 4 December 2006

2006-12-04 09:17:50 · 2 answers · asked by princetongirl81824 2 in Biology

1)Suppose 8.00g of CH4 is allowed to burn in the presence of 6.00g of oxygen. How much (in grams) CH4, O2, CO2, and H2O remain after the reaction is complete?

I have CH4 - 16g/mol , O2 - 32g/mol , CO2 - 42g/mol , H2O 20g/mol

I know that this question has been asked earlier but they explained it but I could not understand the steps. So if someone could show me the steps on how to solve this I would love it. I have a test tomorrow and a question is going to be like this on it.

And this question I only ask for steps on how to do it. I want to find the answer and learn. I can figure out A but need help on B


2)Consider the combustion of methane, CH4:
CH4(g)+2O2(g) -->CO2(g)+2H2O(g)
Suppose 2.8 moles of methane are allowed to react with 3 moles of oxygen.
A)what is the limiting reagent
B)How many moles of CO2 can be made from this mixture? How many grams of CO2?

2006-12-04 09:17:03 · 1 answers · asked by fcb1012 2 in Chemistry

Why would you want to put a fluid under pressure?

2006-12-04 09:16:33 · 3 answers · asked by Anonymous in Astronomy & Space

1.) Define buffer in terms of its components.

2.)Write an equation for the reaction of H+ with a solution containing both HCO3- and CO3 2-.

3.) Write an equation for the reaction of OH- with a solution containing both HCO3- and CO3 2-.

4.) Is the solution of NaHCO3 and Na2CO3 a buffer solution? Explain using chemical equations.

These questions are for a Pre-lab. I was absent from school last week and need to finish this so I can do the lab tomorrow. Thanks for the answers.

2006-12-04 09:15:56 · 3 answers · asked by Dan 2 in Chemistry

find the derivative

2006-12-04 09:15:43 · 3 answers · asked by Ishmal 1 in Mathematics

2006-12-04 09:12:15 · 2 answers · asked by Emmanuel A 1 in Mathematics

Magnesium reacts with dilute hydrochloric acid according to which of the following equations?

a) Mg + 2HCl → 2H+ + MgCl
b) Mg + 2HCl → H2 + MgCl2
c) Mg + 2HCl → Cl2 + MgH2
d) Mg + 2HCl → Cl2 + Mg2+ + 2H+

2006-12-04 09:10:49 · 5 answers · asked by farxfromxlonelyx 1 in Chemistry

are they really nasty or friendly?

2006-12-04 09:10:27 · 10 answers · asked by yoube72 2 in Astronomy & Space

no wood allowed POP C

2006-12-04 09:10:21 · 9 answers · asked by STEVE1984 1 in Zoology

Basic properties are characteristic of all alkaline earth metal oxides except one. The formula of this exception is

a) BeO
b) MgO
c) SO2
d) B2O3
e) CaO

2006-12-04 09:08:15 · 3 answers · asked by farxfromxlonelyx 1 in Chemistry

2006-12-04 09:07:55 · 3 answers · asked by LTP 1 in Geography

I want to build a hovercraft for my science fair project but i dont know i can phrase a question to make it like a project. Could someone give me some help?

2006-12-04 09:06:45 · 4 answers · asked by Anonymous in Engineering

What's the chemical equation that occurs when vinegar is added to ammonia (on a molecular level)

2006-12-04 09:06:11 · 2 answers · asked by *Star* 1 in Chemistry

How can molecule, such as CO2 or CH4 contain polar bonds yet still be a non polar substance?

2006-12-04 09:06:04 · 2 answers · asked by Anonymous in Chemistry

are supposed to be the most venomous creatures
could yoo make a poison from dead dried ones?...hmmmm?

2006-12-04 09:05:48 · 11 answers · asked by bad juju girl 1 in Zoology

????

2006-12-04 09:05:37 · 4 answers · asked by Samantha G 1 in Biology

2006-12-04 09:04:21 · 2 answers · asked by Dustin w 1 in Physics

What/How are camels used for in Africa???

2006-12-04 09:04:19 · 5 answers · asked by Anonymous in Zoology

The sheet is then folded up to make a tray of depth x cm. What is the domain possible values of x? Find the value of x which maximises the capacity of the tray.

Who can help me with this maths problem?

2006-12-04 09:03:16 · 2 answers · asked by Anonymous in Mathematics

I got FeCl2, but I'm not sure if I'm on the right track, thank you :)

2006-12-04 09:01:22 · 4 answers · asked by Dee 2 in Chemistry

algebra

2006-12-04 09:00:01 · 6 answers · asked by Mayra M 1 in Mathematics

find the derivative

2006-12-04 08:59:59 · 5 answers · asked by pago 1 in Mathematics

In the future, would it be possible to use the uninhabited planets in our solar system to re-fuel our sun?

2006-12-04 08:59:54 · 26 answers · asked by Avon 7 in Astronomy & Space

There are about 34000 different ways. I just need a site or something to give me them. it will boost my grade so much and I can show up my math teacher because he gave me the challenge to write them all down. he just never said how i can get them

2006-12-04 08:59:09 · 3 answers · asked by baseballman1243 1 in Mathematics

2006-12-04 08:57:10 · 11 answers · asked by Celeste P 7 in Medicine

after yoo've pulled them off?

2006-12-04 08:56:41 · 10 answers · asked by bad juju girl 1 in Zoology

I read somewhere that NASA has never gone to moon and this they have done to get extra funding from the federal government for research. I have no confirmation of this would like to know is there is somebody knowing about this issue. there are numerous questions seen to be raised by many seeing the video of neel armstrong reagrding the video, flag flying and photos. so are there any specific and true information some one can give.

2006-12-04 08:55:38 · 15 answers · asked by catchmitesh 1 in Astronomy & Space

2006-12-04 08:53:01 · 25 answers · asked by Anonymous in Zoology

algebra

2006-12-04 08:51:31 · 8 answers · asked by Mayra M 1 in Mathematics

does anyone know any god advice to get a snowday

2006-12-04 08:51:07 · 3 answers · asked by dalter 1 in Weather