Chemistry

Chemistry help with oxidation reaction

Can someone explain to me in the simplest words possible how to do them? For example:Co(s)+PbCl2(aq)----->CoCl2(aq)+P… Which substance is oxidized? Sorry i literally been hit in the head with a baske

How to solve this limiting reactant problem

3Si + 4N2 --> 2Si3N4. Determine the mass of silicon nitride produced when 5.00g of Si react with 2.50 grams of nitrogen gas. Its a limiting reactant problem, Ive tried it out, and Im not 100% sure o

Why does it take more base to neutralize a weak acid than a strong acid

So on the pH versus volume graph, it showed that HCOOH required more volume of the same 0.2 mol/L NaOH as compared to HCl. It seems like it would make sense if it required more NaOH to neutralize the

How to balance redox equations using the half-reaction method

1.Sn^0 + Ag+ ---> Sn+2 + Ag^0 2. PbS + H2O2 ---> PbSO4 + H2O-Sn + Ag+ --> Sn 2+ + Ag Sn is oxidized, Ag is reduced Sn --> Sn 2+ + 2e- 2Ag+ + 2e- --> 2Ag Sn + 2Ag+ --> Sn 2+ + 2Ag balance in acidi

Need help with a general chemistry problem!

What is the conjugate acid of H2S? How do you get the answer?-H3S H2S under normal circumstances would be a weak acid and HS- would be its conjugate base: note HS- has 1 less proton than H2S.But your

Please help me with this chemistry question

4. If epsom salt MgSO4.zH2O is heated to 250 degrees celsius all of the water of hydration is lost. After heating a 2.04 g sample of the hydrate, 0.989 g of anhydrous MgSO4 remains. How many molecules

10 points!?!? please help ^ ^?!?! does lone pair count as a sigma bond

my teacher wrote NH3 lewis structure ...3 single bonds and a lone pair...yet it sums up to 4 sigma bonds...that means a ,one pair counts as a sigma bond right? thank you so much :)-Every bond is made

Which intermolecular forces occur within these molecules/atoms...

HBr, CH3CH2OH, and Ar atoms. The options to choose from are Ion-Dipole, Dipole-Dipole, London Dispersion Forces, and Hydrogen Bonding. Anyone know how to identify which forces are at work?-HBr = dipol

Interactive Simulation – Avogadro's Law

PART A In the simulation, set the sample gas to a temperature of 304 K. Click on the Run button and observe how the numbers of moles vary with an increase in volume. Then click on Reset and set the te

Explain why 1-iodopropane is hydrolysed faster than 1-bromopropane

explain why 1-iodopropane is hydrolysed faster than 1-bromopropane?-i think the guy above is trying to be too smart all you need to know is the bond round the carbon and iodine C-I has a lower bond en

Chemistry help. need to figure out freezing point of solution

Some physical properties of water are shown below. freezing point0.00°C boiling point 100.00°C Kf 1.86°C/m Kb 0.512°C/m What is the freezing point of a solution of calcium chloride that contains 73.0

CHEM: I am not sure what the question means..any help/hints will do...

You weight out 0.2023 g of primary Standard Na2CO3, 99.85% pure and it took 41.0 ml of 0.1M HCl to completely protonate the Na2CO3 in 0.2023g sample of Standard. Net eq: Na2CO3 + 2HCl ---> 2NaCl +

Electrolytic Cell Question

A total charge of 96.5 kC is passed through an electrolytic cell. What mass of copper will be produced from a copper(II) chloride solution? Answer in units of g. Help please?-My favourite kind of ele

For each of the following sets of atoms and ions, arrange the members in order of increasing size

For each of the following sets of atoms and ions, arrange the members in order of increasing size: A) Se^2- , Te^2- , Se B) Co^3+ , Fe^2+ , Fe^3+ C) Ca, Ti^4+ , Sc^3+ , D) Be^2+ , Na^+ , Ne Thank

Is helium incompressible ? what is the density of helium in different units

0.1785 kg/m^3 1.1143 x 10^-2 lb/ft^3 1.8 x 10^-4 g/mL 1.78 x 10^-4 g/cm^3 Density is temperature dependent so you must be careful to specify the temperature of the gas.Usually it is either at STP or