CHEM! (SCIENCE) NEED HELP

74,047 results

science(chem)

I need help finding information on how the conway microdiffusion is done/how it works. And why the sample is titrated. Thank you

science(chem)

I need help finding information on how the conway microdiffusion is done/how it works. And why the sample is titrated. Thank you

CHEM! (SCIENCE) NEED HELP

Balance the equation; ___Mg+__HCI->__MgCI2+__H2 How many moles of hydrogen gas are produced when 3.0 molesbof magnesium react?

Chem

Calculate the expected volume of hot water that would be required to dissolve 0.15g of benzoic acid, vanillin, phthalic acid, salicyclic acid? You don't need to do all or any of them. I just need to know what formula to use and what to sub in and I can do the rest myself. I ...

CHEM! (SCIENCE) NEED HELP

According to the reaction below,if 24 moles CO2 were produced,how many moles of C2H6 were reacted? 2C2H6+7O2 -> 4CO2+6H2O

6th grade science

I need help. Quick.I need an idea on how to do a science project that has to have somthing to do with types of energy,atmopsphere or life science. I only have 2 more weeks left. I need an idea. thanks :)

6th grade science

I need help. Quick.I need an idea on how to do a science project that has to have somthing to do with types of energy,atmopsphere or life science. I only have 2 more weeks left. I need an idea. thanks :)

Chem Help!

I really need help with this question for my chem H.W. 1) On a summer day in Breckenridge, Colorado, the atmospheric pressure is 525 mm Hg. What is this air pressure in atmospheres? (round to the hundredths place) atm

science fair

I need a science fir project!! I looked on a thousand of websites online but they give no interesting idea. I am in 6th grade and i need something at a 6 grade level that is easy a science fair project that is do in 1 week. i am in 6 grade and i don't need experiments from the...

Science

Science project ideas for science fair. I need to prepare a model for science fair. But I need some ideas about the major problems facing today's world. So that I can get idea for improvement in any area and to show this in science fair. Please get me know about the ...

Biology (Science)

Why is water a polar molecule? Please read: (Broken Link Removed) AND http://ghs.gresham.k12.or.us/science/ps/sci/ibbio/chem/notes/chpt2/polar.htm

CHEM! (SCIENCE) NEED HELP

Determine the moles of aluminum acetate,AL(C2H3O2)3,that can be made if you do this reaction with 12 moles of acetic acid (C2H3O2H) C2H3O2H+AL(OH)3->AL(C2H3O2)3+3H2O

Science Fair Project

Please help any tutors around, i really need help on what topic to choose, and my science fair is in February 16, 2015!!!!!! I just want to get a really good mark so i get an A in Science again this year in my report card. From a Student in need!!!Wimbika

science need help Ms. sue

What are the materials I need for my science project. my science project is "How does stress affect your body"

Science

I really need help with my science which is based on Galileo Galilei. I need information about his early life,education, his fun facts, his contributions,and how his contributions affect us. i got some information but i need help finding proper info. thanks

science

i need help writing up the discussion for a science experiment. I need to know what to include and say in it.

Organic Chem Lab

Assume your unknown ketone is 2-pentanone. What is the molar mass of your 2,4-dinitrophenylhydrazone product? I don't need or even want the answer, I just need an explanation of how to start working the problem. Thanks!

Chem 2

i need help setting this problem up i know what the answer is but need to know how to get to it. calculate the kinetic energy in joules of an automobile weighing 2135lb and traveling at 55 mph (1 mile=1.6093km, 1lb=453.59g)

chem/science

Please predict what will happen. Im not very good in chem. Iron metal and pb(NO3) Lead metal and Mg(9NO3)2 Copper metal and AL(NO3)3 Lead metal and AgNO3

Science

Hello, I just started my chem class today and I am totally stuck on this question: Hurriance Katrina had the 2nd lowest ever recorded barometric pressure at 0.920 mb. Convert this pressure to units of… a. atmospheres. b. Inches of Hg. I know i need to convert but I'm not ...

Chem Help!

I really need help for my homework on balancing equations please show all the work including the coeffients if needed. I need help with 3 questions, 1) NaN3 -> Na + N2 2) NO2 + O2 -> NO + 03 3) LiOH + CO2 -> Li2CO3 + H2O

science

......I have a science project and i have to build a toy that contains a level and can convert potential into kinetic energy. I need help i need an example something!!!!!

Science/English

I still need the help of a science teacher. I urgently need to know where to look for English vocabulary used to describe the equipment of both a chemistry and a computer laboratory.

chem -repost for bobpursley

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

need ideas on science fair project!!

im doing a science fair project on teeth.... and i need ideas. i hve already tried what kind of soda affects the tooth most, and i need more ideas! plz help!!

science

i need help on my science project i have a science fair on march somethin please give me any ideas possible u know plz thanks. (0.o)

chem

i need help

Chem 2

need to figure out how to calculate. the value of DeltaH for the reaction below is -72kj_____kj of heat are released when 1.0 mole of HBr is formed in this reaction. H2(g)*Br2(g)> 2HBr(g) I know the answer is 36 but need help

science(chem)

what is a distribution coefficent?

Science

I really do need help finding Science Fair Ideas. Hellppppppp Meeee!!!! Oh yeah I'm in 5th grade!! I need help finding Science Fair Ideas.

actuarial science

To get into an actuarial science program I was wondering was sort of high school courses I would need to take and what kind of marks I'd need to acheive. I`ve tried googling this but I can't seem to find information on this anywhere :S

Science

I need help on this fill in the blank science question for my study guide on Cellular Respiration "More active cells need more ______ to release more _______"

science

i need an acrostics for punnett square!! i hv to have it by tommorrow and i cant think of anything and my science book isnt hellping much at all!!!! pwease helppp!and not an acrostics poem... i just need an acrostics

chem

need help on chemistry below

Science

I need to make an acrostic poem for science. My teacher said that each letter needs to start a sentence about plant life. The word is photosynthesis. I need some ideas by the 13th of June. I already have p-h-o-t of photosynthesis. Pls help me!

chem

i don't know how to solve this. looked through all my note but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g) at 1 atm and 0 ...

CHEM! (SCIENCE) NEED HELP

How many moles of water will form if the reaction has 9 moles of Cu? how many moles of NO will form if the reaction has 9 moles of Cu? 3Cu+8HNO3->3Cu(NO3)2+4H2O+2NO

science(chem)

How would I make a 5% solution of sodium bisulfite? sodium bisulfite: NaHSO3 Molar mass: 104.06 g/mol is it 5% w/w or v/v or w/v b/c if it was w/w then it would be weight percent w/w= weight solute/ weight solution* 100 I need help on this Thanks

Science Helpers

My science post is almost at the bottom and I need it to be checked urgently. I see science helpers on this site as of right now.--Can you please have a moment to look at my Science post. Thank you very much in advance:-)

science

help with the chem lab. the molecular of a volatile liquid.

SCIENCE/CHEM

how many electrons can be contained in all orbitals with n=4??????

Chem/science

what is the ph of 2.62 x 10 ^-2 M HBr solution? I get 5.94 is that right? thanks andy

Advice...about chemistry degree Dr.Bob

Based on the question topic posted by Britney below titled:In your opinion (your answer to this reminded me of something) (I posted the same thing there but I thought it was improper to piggyback on that post so I posted this under a new topic) I don't know where to start but ...

SCIENCE/CHEM

the purity of zinc is to be determined by measuring the amount of hydrogen formed when a weighed sample of zinc reacts with an excess of HCL acid.the sample weighs 0.198 grams. what amount of hydrogen gas at STP will be obtained if the zinc is 100% pure? need a metric answer ...

science

what are the answers to the ecosystems packet for 7th grade in science? I need the answers asap because i need to finish getting all of the answers to the packet so i can study it tonight because i need to make up the test to that packet and it is because the day my teacher ...

science

Dr bob, can you check my reply to chem question from andy thanx

Chem/science

What is the conjugate acid of HC5H6O4-?? Is it HC5H6O42-?? thanks andy...

chem

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

chemistry

i have to do a "chemistry of cooking" project for my chem class. for the project i need to convert pounds, grams, and ounces into moles, but i do not know how. for example, i need to convert 453.5g of beef into mols. how do i do that? do i need to know the chemical formula of ...

science(chem)

I synthesized Nylon in my lab for organic chem. I need help figuring out the theoretical yield so I can compare it to my product that I synthesized. I looked up the reaction online on Google by typing in "Synthesis of adipoyl chloride and nylon 6.6." I clicked on the first ...

science

i need help on my science crossword puzzle ok,what do you need help on?

SCIENCE FOR 7TH GRADE

i need to conduct a scientific investigation and i need some ideas. Ex. " how does the amount of sunlight affect a plants growth" I need something like what is listed above. Thank you

chem- repost

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

chem- repost

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

chem- repost

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

science: ap chem

is NaH2CO3 soluble and separate into Na+ and H2CO3- ions?

science /chem

1250.37986 rounded to four significant figures is ??????

science/chem

Why do the d and f block elements have only 2 valence electrons?

science

please help me i am in 4th grade and i need help on my science project. my science project is, is smiling contagious and i have no idea what to do for research and data

Science

What is a good science project to do? I am in 8th grade and am studying earth science. I need to present the project in front of class. Im really nervouse.

Chem Urgent!

I need help in balancing equation for NO2 + O2 -> NO + O3 Please help...

Chem

How many grams of NaOH9(m.w.=40) do you need to prepare 200ml of .5M NaOH

chem please help drbob222

When is there a need to determine G? A. When H > 0 and S = 0 B. When H > 0 and S > 0 C. When H = 0 and S < 0 D. When H > 0 and S < 0 P.S. there are triangles before the G, H, and S.

heat/science Xtremely important

Please help! I need a good website for HEAT in science! I'm in 8grade and I need info on heat http://www.school-for-champions.com/science/heat.htm

Science

I need some ideas for a science project on animal cells. For each structure I need to find an everyday object which has a similar job or function as that cell part. For example, the nucleus is like a brain. My list includes Lysosome, Golgi Body, Nucleolus, Mitochonrion, ...

chem- science - grd 11

okay so i have to prepare a procedure for the following experiment, except i have no clue what to do question- the science department had 5 different solutions but accidently lost thier labels. devise a procedure to help you determine which liquid is what? *hint- you may use ...

Science

How do I read this: "Robotic" World of Computer Science. Gale, 2002. Gale Science in Context. web 8 Aug. 2012. i know this is a ciation but I need to incorporate it into asummary paragraph

science fair

I need to do a project for the science fair but I don't know what to do. My science teacher says it has to be like the water dancing on a penny, everything has to be the same but you have to change one thing. What can I do?????? HELP ME PLEASE :/

Science

I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?

Science

I need some answers for my science essay... We have a research report and I cannot find these answers ANYWHERE. The sport I chose for the assignment was Quidditch (awesome, right?) and I cannot find work for a bludger, quaffle, golden snitch, or players. I need at least two ...

Science Fair Project

Please help anyone!!!!!!!!!!!!!!!!!!!!!!! I need a science project that can be done in 2-5 days but also that can give me a very good mark!!!!!!!!!!!!!!! please reply A.S.A.P.!!!!!!!!!!!!!!!!!! -From a Science Fair Project in need of a project which can be done in 2-5days.B.T....

chem

i need to balance this redox euation Mn+2 +H2O2----- MnO2 + H2O

Chemistry

Is DrBob222 available tonight? Please let me know, I need some chem help.

CHEM! (SCIENCE) NEED HELP

How many moles of CaCI2 will be formed if you react 1 mole HCI? How many moles of CaCI2 will form if you react 5.5 moles of CaCO3? 2 HCI+CaCO3->CaCI2+H2O+CO2

Psychology

Need help double checking these tricky psychology questions. I put an asterix (*)next to my answers, Thanks! Which of the following fields is the best example of psychology as a basic science? A-Educational psychology B-industrial organizational psychology *C-social psychology...

Science/Chem

How many representative particles are in 2.5 mol H2O2? each mole consists of 6.02*10^23 things. Memorize that.

SCIENCE/CHEM

when the following equation is balanced , what is the sum of the co-efficients? AL2(SO4)^3+Ca(OH)2-->Al(OH)3+CaSO4

science

hey im doing my science homework and i really need hel fast cuz i need a discription(definition), a sentence, and a pic. for thermal expansion, exfoliation, dissolution, oxidation, and hydrolysis i would look in my text book but none of those words are in there i know because ...

science-chem

if i am given 2 pairs of aqueous solutions and I need to know which one has lower electrical conductivity? Are my answers correct? Ex/1M magneisium bromide and 1M lithium bromide.....Litium Bro. has lower electrical conductivity Ex? 1M Potassium phosphate or 1 M potassium ...

chem

1. A single mole of AgNo3 weighs 169.88 grams. In order to make a 1M solution, how many grams of AgNo3 would need to be dissolved in 5oomL? How many moles do you need? moles = M x L. please help today

chem

help me i hev a lab You need to post a question with details about what yo don't understand.

chem

a student has to prepare 3 liters of a 1.5 M solution of C6H12 O6. What mass of C6H12O6 does she need?

chem

calories need to melt 60.0 of ice at 0 and to warm the liquid to 65 (two steps)

chem

What does it mean by Keq? Pls need an explanation with this. I'm a little bit confused. Thanks

Chem

If you need 2.74 moles of acetic acid how many liters of your vineger must you take

Chem.

I need a 64% solution of ammonium chloride. I have 99% ammonium chloride powder. How many grams of the NH4CL do i need to add to 500 ml of water to get the 64% solution?

Psychology

Need help double checking these tricky psychology questions. I put an asterix (*)next to my answers, Thanks! Which of the following fields is the best example of psychology as a basic science? A-Educational psychology B-industrial organizational psychology *C-social psychology...

Gen Chem II

How many mL of 0.0875 M H2SO4 would you need to exactly neutralize 50.00 mL of 0.135 M NaOH?

chem need assistance

7. At pH 7.4 a weak organic acid with a pKa of 6.4 would be ionized at what percent?

chem

How many mLs of a stock solution of 1 M NH4NO3 do you need to get 0.001 M of Nitrogen in 22 liters of water?

chem

How many mLs of a stock solution of 1 M NH4NO3 do you need to get 0.001 M of Nitrogen in 22 liters of water?

Science

I need some ideas for a science project. I need to find a picture of an everyday object which has a similar job or function as that cell part. For example, the nucleus is like a brain. My list includes lysosome, golgi body, cell membrane nucleolus, mitochondrion, endoplasmic ...

science

1) what is the mass of 10 cc of water? 2) why does a block of wood float on water? 3)how and why can density by used to identify an unknown substance? 4) describe the relationship between density, water, an d things that float please help me just need these answers to study ...

science

tell me about science apparatus They are used in science. You need a much more specific question to get a useful answer. For instance: What is the Hoffman apparatus, and how is it used?

science

I really need some help...so please give me an acrostic for the word; "science"

science

i am doing a science project and i need to kno how flares work, and what the ingredients are. can someone help me?

science

i need to preapare a project on science .... any sort of experinment.... what can be done that is intresting and then easy....

science

need a science project for 7th grade using toy train.

science

Hi, tomorrow is my science practical and i need help with independent and dependent variables. PLEASE HELP

science

i need help with a reason for the season science lab of how earth orbits sun

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