Chemistry

In order to prepare for the Olympics, Holly needs to run 10,560 feet each morning. How long of a distance is..

My answer is 3,000m, but I am unsure if this is correct. My class is currently doing unit conversions with rounding to the correct number of significant figures and Im sad to say that I dont quite get

How many grams of H2 are needed to produce 10.41g of NH3

How many molecules (not moles) of NH3 are produced from 7.94×10−4 g of H2?-Balanced Equation:N2 + 3 H2 --> 2 NH3 10.41 grams NH3 X (1 mol/17.00 grams) = 0.612 moles NH3 X (3 mol H2 / 2 mol NH3) = 0.9

Can anyone help me with these chemistry and one geometry question

CHEMISTRY: TRUE OR FALSE? An element is considered a pure substance, but a compound is not. A compound is composed of 2 or more elements in a fixed ratio. A solution has a uniform composition. Co

Why are acids placed in burettes with glass-tipped stopcocks while bases are placed in rubber-tipped burettes

in an acid-base titration?-Because strong alkalis (Such as NaOH) react with glass - acids (apart from HF) do not. If you leave NaOH(aq) in a burette with a glass tap for any length of time without th

Specific Gravity: Chemistry HW HELP! (: Pleaseee!

Calculate the specific gravity of a substance that has a mass of 4.6 kg and a volume of 609 cm cubed at 25 degrees C. Its due tomorrow and I cant figure out how to solve it. please help me! I have to

Weighted average of the naturally occurring isotopes for an element, relative to carbon-12

it s 2 words . . . and there are 10 spaces. i believe that it should look like this __ __ __ __i__ __ a __ __-atomic mass

What is the qualitative method for identifying an element based on the color of light emitted from and excited

There are 9 spaces . . . 2 words i believe that it should look like this F __A __ E __ __ S __-flame test saka extra credit?? lol

Which naturally-occurring radioactive particles are negatively charged

1. gamma radiation 2. neutrons 3. beta particles 4. alpha particle-Beta particles.Alpha, beta, and gamma are the first three letters of the Greek alphabet.After radioactivity was discovered, Ernest Ru

Are glucose and dextrose the same thing

technically yes http://answers.yahoo.com/question/index?…

Acids, Bases and Salts (Reactions)

1) Apparently, BOTH an acidic oxide and acid would react with an alkali to produce salt and water (neutralisation). But acidic oxides are not acids right? You need to add water to the former before it

Molecular weight = gRT/PV ...why

can anyone explain to me where this formula comes from?-Its just the formula that works.

Hard Equilibrium chemistry question!

Hey guys PLEASE help me out with my Year 12 chemistry work! Here is the question that I dont understand: 2.0 mol N2, 1.0 mol NH3, 1.0 mol H2 are heated in a 1.0L flask at 400 degrees celcius for the

What are some examples of irregular solids

I need legit irregular solids that can be used in a density experiment.A lantern or a grain of rice wont due. Rice cooks; a lantern is empty.your help is extremely appreciated!! thxx! :)-a] Nails an

What are three household bases

Household Acids lemons, grapefruits, vinegar, soda, beer, tomatoes and tomato juice. Household Bases antacids, milk, ammonia, drain openers, oven cleaners and detergents.

What the processes to produce the bulk chemicals ammonia or sulphur hydroxide

for my chemistry homework-There is no compound known as sulphur hydroxide may be you meant sulphur trioxide. Ammonia is commercially produced by reacting N2 with H2 in presence of Fe catalyst and Mo p