Chemistry - March 2007

How is it possible to safely drink orange juice?

2007-03-24 03:46:45 · 3 answers · asked by Anonymous

a) 1
b) 1 1/2
c) between 1 1/2 and 2
d) 2

2007-03-24 03:41:37 · 2 answers · asked by Anonymous

chlorine, oxygen, calcium, or strontium

2007-03-24 03:38:44 · 5 answers · asked by Anonymous

relationship between the frequencies of these two waves?
a) v red = (1.5) (v blue)
b) " " " = (1.2) (v blue)
c) " " " = (0.75) (v blue)
d) " " " = (0.67) (v blue)

2007-03-24 03:34:59 · 1 answers · asked by Anonymous

why is the understanding of a covalent bond useful? provide several reasons, including general or specific examples

thanks!!!!!

2007-03-24 03:29:49 · 5 answers · asked by Anonymous

a) scientists do not have a good method for measuring atoms
b) atoms have irregular shapes
c) it is difficult to isolate a single atom to measure
d) the outer edge of an atom is difficult to determine

2007-03-24 03:28:11 · 6 answers · asked by Anonymous

magnesium nitrate (Mg(NO3)2). This mixture could have resulted from the combination of which of these pairs of solutions?
a) a solution of MgO and a solution of NH3
b) a solution of Mg(OH)2 and a solution of NH3
c) a solution of Mg(OH2) and a solution of HNO3
d) a solution of MgO and a solution ofHNO2

2007-03-24 03:23:36 · 4 answers · asked by Anonymous

2007-03-24 03:20:27 · 7 answers · asked by Anonymous

We all see the Mentos and Coke reaaction 'splosion thing... just curious, is there any other kind of drink that would have the same effect?

2007-03-24 03:16:22 · 1 answers · asked by firefox281 2

2007-03-24 03:11:04 · 1 answers · asked by Chocolate Strawberries. 4

I'm trying to figure out my chem HW.

2007-03-24 02:57:44 · 7 answers · asked by mbtafan 3

puckered rings from 12th std chemistry.

2007-03-24 02:47:03 · 4 answers · asked by naina 1

2007-03-24 02:31:38 · 3 answers · asked by nobody 1

a) the 3p orbital has two nodal planes, and 2p has one
b) the 3p orbital is farther from the nucleus than 2p
c) the 3p orbital is a diff. shape than the 2p orbital
d) both a and c

2007-03-24 02:29:03 · 2 answers · asked by rnjes21 2

2007-03-24 02:04:43 · 4 answers · asked by Anonymous

The equation from the combustion of hexane is:
C6H14(g)+19/2 O2(g) -(arrow sign) 6CO2(g)+7H2O(g)

Calculate the number of moles of
a) CO2 produced in the combustion of 1.50 moles of hexane

b) H2O produced in te combustion of 0.25 moles of hexane

c) O2 consumed in the combustion of 0.40 moles of hexane

Note: (g) is a subscript and means gas. I don't know the processes involved in finding the answers. Could you please, chemistry whizzes, show me and explain to me the processes before showing the answer. I have been looking through my books etc for over 1 hr 20 minutes (honestly) on these 3 parts to the question. Please help me! Thankyou

2007-03-24 01:33:31 · 5 answers · asked by Anonymous

2007-03-24 01:29:43 · 3 answers · asked by Anonymous

I have a dry sample of what I can presume is blood. Is there any way to test with household materals, spices, chemicals, anything to see if it is positive for blood.

2007-03-24 01:27:36 · 1 answers · asked by slasher42424 2

2007-03-24 01:00:02 · 5 answers · asked by essence_05 3

2007-03-24 00:59:01 · 5 answers · asked by Chocolate Strawberries. 4

oxidation of ethanol with chromium anhydride(catalyst) gives ethanal whereas oxidation with alk.KMnO4(catalyst) gives ethanoic acid.

2007-03-24 00:48:30 · 2 answers · asked by Anonymous

Does anyone know what type of things a research scientist would do if they chose something to do with chemistry? Also- is the pay a lot? Thanks.

2007-03-24 00:48:23 · 1 answers · asked by pink_h_moon 4

It is covalent bond or ionic bond?
So many people tell me that it is ionic bond while I still think it is covalent bond!!!

Can anyone help me?

2007-03-24 00:32:52 · 10 answers · asked by Anonymous

ok this is a chemistry question i am really stuck with~~~~~ahh

is melting of wax a chemical change of a physical change??

you see melting means is physical change but it involves burning so need oxygen so is combustion so is chemical change so which is it!!!!!!!! pls help sobsob

2007-03-24 00:15:38 · 9 answers · asked by Anonymous

2007-03-23 23:02:47 · 6 answers · asked by Anonymous

pls give me the answer quick?tyyyyyyyyyy

2007-03-23 23:01:01 · 4 answers · asked by Batista 2

2007-03-23 23:01:00 · 4 answers · asked by are-u 1

1. u cant use water.
2. prepare any volume and use as much of both solutions u want.
3. plz give a formula

2007-03-23 22:17:51 · 3 answers · asked by dew 1

Ok, i've been looking everywhere for the answer for these questions: Thanks to those that answer. I appreciate it :)
1. Is there any difference in the products of base hydrolysis and acid hydrolysis??

2. What 3 products are formed when aspartame in hydrolyzed in aqueous base?

3. When aspartame is not used in products. Why is it need to be cooked???

Again, Thanks.

2007-03-23 22:05:03 · 4 answers · asked by Anonymous

why do all chemistry tests (especially testing for acidity or alkalinity) require distilled water and not tap water? and why do many tests use dry reagents (like dissolving solid citric acid in water) instead of liquid form?

2007-03-23 21:51:39 · 5 answers · asked by blubbablub 1