Chemistry - September 2007

A spacecraft is filled with 0.500 atm of N2 and 0.500 atm of O2. Suppose a micrometeor strikes this spacecraft and puts a very small hole in its side. Under these circumstances,

a. O2 is lost from the craft 6.9% faster than N2 is lost.

b. O2 is lost from the craft 14% faster than N2 is lost.

c. N2 is lost from the craft 6.9% faster than O2 is lost.

d. N2 is lost from the craft 14% faster than O2 is lost.

e. N2 and O2 are lost from the craft at the same rate.

2007-09-29 10:18:10 · 1 answers · asked by Anonymous

Arrange In increasing ionization energy.

Ar Cl Li Na P


there are exceptions to the rules I just can't remember what they are


A. Ar B. P C. Na < Li < P < Cl < Ar
D. P < Cl < Ar < Li < Na
E. Cl

2007-09-29 09:47:16 · 1 answers · asked by desigoddess217 1

Molecular chlorine and molecular fluorine combine to form a gaseous product. Under the same conditions of temperature and pressure it is found that one volume of Cl2 reacts with three volumes of F2 to yield two volumes of the product. What is the formula of the product

2007-09-29 09:38:30 · 4 answers · asked by PiNk-PrInCeSs 3

2007-09-29 09:10:56 · 2 answers · asked by Puppyluver 2

2007-09-29 09:00:51 · 3 answers · asked by l_walker2005 1

2007-09-29 08:54:55 · 5 answers · asked by needtoknow 1

Na_2SO_4+ Ba(N0_3)_2 + HNO_3

_# means # is a subscript

2007-09-29 08:41:55 · 3 answers · asked by Anonymous

Na_2SO_4+ HNO_3

_# means # is a subscript

2007-09-29 08:38:19 · 1 answers · asked by Anonymous

Is talc asbestos? I understand there is an incredient in baby powder that is detrimental to humans. Do you know what it is?
An organic farmer at our farmer's market is using "baby powder" on the apples to keep the birds away.

2007-09-29 08:36:18 · 4 answers · asked by Lilaac 2

phisical or chemical-
1) metals tarnish in moist air
2)gasoline burns
3)paint fades

2007-09-29 07:58:26 · 8 answers · asked by skeena25678 2

is it excited state?

2007-09-29 07:52:45 · 3 answers · asked by Nina A 2

( this is from the chem lab finding the formula of a hydrate)

2007-09-29 06:50:59 · 3 answers · asked by pink 1

I'm having trouble understanding the difference between what enthalpy and heat are and how they're related.

2007-09-29 06:46:37 · 2 answers · asked by bob oso 2

Calculate the mass of 3.37×1021 molecules of copper(I) carbonate.
Calculate the number of lithium ions in 3.53 g lithium sulfate.

2007-09-29 06:40:14 · 2 answers · asked by Anonymous

Enter the formula for each of the following binary ionic compounds.
magnesium phosphide

aluminum selenide

cobalt(III) telluride

iron(III) sulfide

2007-09-29 06:36:45 · 2 answers · asked by Anonymous

heres the question..

Specimens in the compound scope are:

a. reversed
b. inverted.
c. reverse and inverted
d. unchanged

i think the answer is C but im not sure .. can some one help me?

2007-09-29 06:32:51 · 2 answers · asked by athrun360 2

A compound contains only carbon C, hydrogen H, and oxygen O. When 6.737 grams of this compound is burned completely in air, 16.156 grams of CO2 and 3.307 grams of H2O are produced. What is the empirical formula of this compound?

If the molar mass of the compound described in the previous question is 275.3, what is its molecular formula?

2007-09-29 06:29:03 · 2 answers · asked by Anonymous

A student measures 1.7296 g of a mixture of sand and sodium carbonate, which is later determined to be 24.29% sand.

What mass of Na2CO3 was in the original mixture?
How many moles of Na2CO3 were in the original mixture?

2007-09-29 06:23:25 · 3 answers · asked by Anonymous

atm -how it works

2007-09-29 06:07:46 · 3 answers · asked by Anonymous

2007-09-29 06:00:28 · 2 answers · asked by sciencenerd 2

Wikipedia says that the first acid dissociation constant of H2O2 is 11.65. I would like to know the second acid dissociation constant, which I cannot seem to find. There is not enough thermodynamic data in the NIST WebBook to calculate it myself. Also, I would like to know the answer both for anhydrous hydrogen peroxide and dilute hydrogen peroxide solution.

2007-09-29 05:54:58 · 3 answers · asked by ​ 7

1. Aluminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3 (s) + 3H2SO4 (aq) -----> Al2(SO4)3 (aq) + 6H2O (liquid)

Which reagent is the limiting reactant when 0.500 mol Al(OH)3 and 0.500 mol H2S04 are allowed to react? How many moles of Al2(SO4)3 can form under these conditions? How many moles of the excess reactant remain after the completion of the reaction?

Thanks for any help. Reasoning/steps are appreciated :].

2007-09-29 05:37:12 · 3 answers · asked by RuleOfTheRose 2

2007-09-29 05:26:39 · 3 answers · asked by Anonymous

2007-09-29 05:22:23 · 2 answers · asked by Anonymous

in the reaction, 2Hg+O2--->2HgO
20.0 g of Hg are reacted with 5.00 g of O2. Calculate the maximum amount, in
grams, of HgO formed.

2007-09-29 05:13:19 · 4 answers · asked by chemistrysucks 1

This is an organic chemistry post lab report question.

Also, if you know about recrystallization, benzoic acid has a solubility of 68g/L in 95 C water. What is the min. volume of water it would take to dissolve 10 grams of benzoic acid at 95 C?

2007-09-29 05:11:16 · 4 answers · asked by Samantha 4

2007-09-29 05:10:20 · 6 answers · asked by Anonymous

2007-09-29 05:05:27 · 1 answers · asked by Anonymous

2007-09-29 05:00:13 · 2 answers · asked by Anonymous

pleaae and thank oyu

2007-09-29 04:36:50 · 2 answers · asked by ♥JaM3rIcaN PrInNc3ss 2