Chemistry - November 2007

2007-11-06 09:18:51 · 1 answers · asked by Anonymous

This is in chemistry and we have been doing all sorts of molality equations and so forth and have just been given this and not quite sure i follow.

We are asked in question 4:

Part A
What are the six types of radioactive decay?
I found that they were...
α emission, (alpha)
β emission (beta)
γ emission (gamma)
positron emission
electron capture
spontaneous fission


But then it asks in part B of the question...

Complete the following nuclear equations
a. proton -> neutron + ?
b. neutron -> proton + ?
c. proton + ? -> neutron

am i supposed to use one of the following types of radioactive decay? thanks for the help and assistance!

2007-11-06 09:18:04 · 3 answers · asked by john s 3

Some carbohydrates are related to other substances that aren't carbohydrates in nature enumerate?

this is a question from my biochem. doctor. i tried doing it but no idea. Please guide me if possible with DETAILS PLEASE.


Thanks in advance

2007-11-06 08:57:53 · 2 answers · asked by Anonymous

2007-11-06 08:47:46 · 2 answers · asked by bocabrunette714 1

2007-11-06 08:44:05 · 8 answers · asked by lisa j 1

which of following is the best reaction sequence to use if one wants to accomplish a Markovnikov addition of water to an alkene with minimal sketetal rearrangement

a) water+dilute acid
b) water+concentrated acid
c) oxymercuration-demercuration
d) hydroboration-oxidation
e) none
c,d cant be right cuz that cant be rearrangement
i think answer will be B but i am not sure please help

2007-11-06 08:34:14 · 2 answers · asked by jennifer 2

explain what must happen to a fixed sample of gas when its temperature changes.

2007-11-06 08:23:26 · 2 answers · asked by Anonymous

2007-11-06 08:16:04 · 2 answers · asked by x-trang-x 1

2007-11-06 08:09:14 · 2 answers · asked by Anonymous

1- a solution containing a conjugate base
2- a solution that resists pH change
3- a solution with pH=7
4- a solution containing a weak acid

2007-11-06 06:53:44 · 2 answers · asked by palomita0281 1

Gaseous HCl is evolved from a conc HCl solution (an acid) and ammonia is a gas ( a base).
What is the chemical formula of the "fumes" that form in the ammonia test? Write a balanced equation for the reaction.
thanks

2007-11-06 06:51:30 · 2 answers · asked by bocabrunette714 1

What is the equillibrium equation when you add HCL to cobalt chloride solution CoCl4 2-? Is this and exothermic or endothermic reaction?

2007-11-06 06:50:47 · 2 answers · asked by kaj 1

to treat a spillage from a car battery,y does putting water then washing soda(sodium carbonate)on it work?
please help!

2007-11-06 06:48:48 · 2 answers · asked by Anonymous

1) Iron II oxide + carbon monoxide ----> Iron + carbon dioxide

2) Calcium oxide+ diphosphorous pentoxide ----> calcium phosphate

3) Magnesium chloride + silver nitrate ----> magnesium nitrate + silver chloride

2007-11-06 06:44:40 · 3 answers · asked by Caramel 2

2 questions - please help.


when acids are mixed with alkalis they become?/
acids react with carbonates to produce?

2007-11-06 06:35:24 · 5 answers · asked by Anonymous

When quicklime slakes in the atmosphere, a mixture of calcium carbonate, CaCO3 and calcium hydroxide Ca(OH)2,
forms because of the reaction of quicklime with carbon dioxide and water in the atmosphere. This is the time consuming reaction that occurs when mortar sets. Write balanced equations that represent the setting of mortar

2007-11-06 06:11:10 · 2 answers · asked by bocabrunette714 1

Silver carbonate, Ag2CO3, is a sparingly soluble solid. A saturated solution is prepared by placing solid silver carbonate in pure water in which the silver ion concentration, [Ag1+], was found to be 1.02E-04 M.

a. What is the concentration of carbonate ions, [CO32-]?

b. What is the molar solubility of silver carbonate, Ag2CO3?

c. What is the solubility product constant, Ksp, for silver carbonate, Ag2CO3?

2007-11-06 06:10:12 · 3 answers · asked by Nick P 1

Each of the following processes is a likely change in a redox reaction.?
Label the chemical changes as an oxidation process, a reduction process or neither.

ClO2- --> ClO3- ____________
Co3+ --> Co2+ ____________
(Cr2O7)2- --> Cr3+ ____________
SO3 --> (SO4)2- ____________
H+ --> H2 _____________

thanks:)

2007-11-06 06:08:13 · 3 answers · asked by maybe714 1

and what is the balanced symbol equation of it in combustion??

2007-11-06 05:55:58 · 3 answers · asked by x-trang-x 1

Unknowns Formula weights (amu)
Copper(II) chloride dihydrate
Copper(II) sulfate pentahydrate
Copper(II) acetate monohydrate

Need to identify the formula weights for these compouds

2007-11-06 05:49:36 · 1 answers · asked by Anonymous

in my coursework sheet it asks me :

how many moles of oxygen and how many moles of nitrogen are in 1.50 moles of ammonium phosphate?

can someone help me with this?

i have always had trouble on questions which ask the moles of a part of the compound. it really doesnt make sense.

2007-11-06 05:45:44 · 1 answers · asked by Anonymous

Answer the following questions based on dissolving ammonium nitrate in water. The balanced equation is given below.
NH4NO3(s)+H2O(1)+energy---> NH4+(aq)+NO3-(aq)+H2O(1)
1.based on the information given in the chem. equation, what temperature change would you expect in the reaction
2.Is this an endothermic or exothermic reaction?
3.List at least three of the everyday uses of nuclear reactions that you learned about
4.what radioactive technique is used to determine the age of fossils
5. List one advantage and one disadvantage of using nuclear power plants to produce electricity
6.Carbon -14 undergoes beta decay to become another element. What is the new element?What is the product of the radioactive decay?

___
write the balanced equation for the following reaction: the fuel used in gas grills is called propane (C3H8) propane reacts with oxygen gas(O2) found in the air to produce carbon dioxide gas (CO2) and water vapor(H2O)

2007-11-06 05:40:39 · 2 answers · asked by Alexa I 1

I really need to know how much money an ounce of the element Iodine is, please help

2007-11-06 05:34:30 · 1 answers · asked by believeeeeeee 2

Plastic is made from petroleum, and oil refineries emit cancer-causing Benzene (these 2 we know)... when you heat plastic, particles enter the liquid/food (at acceptable levels, who knows?)... like bottled water, being driven to a store near you in alum. trucks, driving in the hot sunshine, etc. etc. So? what happens when you re-heat your Chinese food, etc? (Thinking aloud here, to see who's got ideas...)

2007-11-06 04:58:31 · 3 answers · asked by Anonymous

Apparently, in the now famous Erin Brockovich story, PG&E told the people of Hinkley, CA that the water they were taking was harmless because the hexavalent chromium turned into chromium 3 in the stomach. I have read about this and it seems that people have all sorts of opinions. So, is this possible, and, if it isn't, why not?

2007-11-06 04:36:11 · 3 answers · asked by Anonymous

2007-11-06 04:21:09 · 2 answers · asked by Anonymous

can someone please answer this thanks

2007-11-06 04:13:52 · 8 answers · asked by simons194 1

i need to figure out the specific heat of a metal
through this given information

metal mass: 27.24 g
dH20: .9973 g/mL
v(h20): ?
Ti (H2O): 23.8 C
Tf(H2O): 31.05 C
change T: 7.25 C
Ti(metal): 100.5 C
Tf(metal): 31.05C
change T(metal): -69.45 C
SH (H2O): 4.184 Jg^-1C^-1
SH(metal): ?

heat of neuatralization

Ti:26.2C
Tf: 35.51C
change T: 9.31
qrxn: ?
no. moles: ?
change Hneut: ?

if you could explain some of that that woudl be great thanks

2007-11-06 04:12:19 · 1 answers · asked by Anonymous

2007-11-06 02:39:25 · 3 answers · asked by Ashley 2

2007-11-06 02:38:25 · 3 answers · asked by Anonymous