Chemistry

Please, help me with my chemistry homework

In my final project I have to find 40 items, and Im almost done, but I cant find the next items (they have to be easily obtainable at home, or from a grocery, drug, or hardware store): -A rare earth

Simple chemistry problem that I need help with (just need you to see what's wrong)

Basically, I have to find the number of atoms in a 4.33 g sample of C6H6. The number of molecules is 33.4e+21, and there are 12 atoms in each molecule of C6H6. So I just multiply the two to get: 400.8

Explain how you would use the universal indicator to distinguish between two acids.

The acids have the same concentration but different strength.-A universal indicator is cool because it is calibrated in such a way that gives you a really close approximation of the pH of the substanc

If 31.3 mL KOH solution is required to reach the endpoint, what is the molarity of the H3PO4 solution

Can you please help me understand how to find the answer to these two problems? I need to understand how to solve them in order to be ready for my exam on Wednesday :( I need help understanding thes

Chemistry Question- Mass of Solutions

Stuck on a Chem question... Q) The solution formed in a reaction has a density of 1.022 g/ml and a specific heat of .9601 cal/g(deg.C). Calculate the mass of the solution.-You cant answer the questio

Are ions always in an aqueous state or solid state

Ions by themselves need to be balanced generally in order to retain their structure etc.. In an aqueous state the bonds in water allows the ions to flow freely, as such electricity can be conducted. I

What is the Definition of a pure substance and some examples

can you please help me out :D I would a apperaite it-A substance that is made of only one kind of atom - or only one kind of molecule.In other words, an element or a chemical compound.In other words,

Can a human generate electricity ? and how

Your brain contains cells that are called neurons. These neurons can create electrical impulses that travel through your body. The amount of electricity is very little, but is strong enough to make yo

What makes an effective buffer solution

Which of the following combinations produces an effective buffer solution? (Select all that apply.) HClO4 and NaClO4KBr and HBr NaF and HFNH4Cl and NH3 And how do you tell?!-NaF/HF and NH4Cl/NH3(aq)

You rent a car in Germany with a gas mileage rating of 11.0 . What is its rating in miles per gallon

Could you also show your work as to how you got the answer? Thank you!-lets assume its 11 KM per liter 1 gal = 3.785 liters 11 km x 3.785 = 41.63 km per Gallon 1 km = .62 miles 41.63 X .62 = 25.81 mil

Find H+ and OH- concentrations

Of... .050 molar NaOH 2.09g of calcium hydroxide in 100 mL of water .875 molar H2SO4 I think if someone can help me through the first one I can get the others. Thanks so much!-First write the chemica

Limiting Reactants/Chemistry Problem

Determine the weight of H2SeO4 that will be formed by reaction of 100.0 g of H2O, 150.0 g of Se and 100.0 g of O2 via the reaction 2H2O + 2Se + 3 O2  2 H2SeO4 For H2SeO4 weight I got 245.022g. Is th

Na3PO4 + Ni(NO3)2 ---> Ni3(PO4)2 : I have a question about this formula. Please help. ;(

What is the Complete ionic equation and the Net ionic equation for this reaction? I would appreciate any help provided to me, Thank you so much! :)-2Na3PO4 + 3Ni(NO3)2 ---> Ni3(PO4)2 + 6NaNO3 6Na(+)

The conversion connector between mass and energy in Einstein’s equation is “c^2” is true or false

10 points to best answer! Is this true or false?-True-true-true

(Easy 10 points) Is 6.28 x 10-27 g is smaller that 4.5 x 10-22 mg

Please give a little detail so I can understand. 10 points to best answer. Thanks!-Convert one to the other: 6.28 x 10-27 g times (10^3 mg / g) = 6.28 x 10-24 mg 6.28 x 10-24 mg is smaller than 4.5