Search results

^ Oh, ok thanks for all your help!

4. M=Mol/vol M= 0.2mol/2.0L M=0.1mol/L *** The teacher said we should only balance with whole nubbers so would it be 2H2 + O2 = 2H2O....? moles of H 0.22 mol sooo... moles of O is also 0.11mol? c)calculate the number of moles of water produced when 4.00 g of oxygen are used 2H2 + O2 = 2H2O...

Hi, I have some reviw questions for the upcomming chemistry exam, the problem is I don't have the answers so can some one read throught my work and check if it is wright? Thanks. *** 1. An anaysis of a valitile liquid shoed that it wsa composed of 14.4%C, 2.37% H and 83.49% Cl. If 4.25 g of...

The cost of extracting and purifying metals is varied for various reasons, this means that the company might not make profit on the iron ore. Since there is a ,relatively, large amount of iron ore it is cheap. This means that the company needs to find a lot of it in order to make a profit. If...

so Fe2O3 + 3CO = 2Fe + 3CO2 Is this right?

^ sorry I ment enviromental. Thanks for all your help!

^ Ok thank you, so no marks taken off by saying there are no positive economic impacts if i explain..right?

I really don't know what catagoir this would go under :confused: , but its an assignment for chem so... Woud there be any positive envromental impacts of iron ore extraction? This was on of the topics we had to reaserch, but form 3 days of searching throught the net, positive effects iron ore...

^ so would it be like this Fe3O + CO = 3Fe + CO2

Carbon monoxide reacts with the iron (lll) oxide. Would it be like this... 3Fe2 O3 + CO= 2Fe3 O4 + CO2

A student obtains 25.00 mL of an HCl solution of unknown concentration. Upon titration, 21.35 mL of 0.1200 M NaOH are required for neutralization. Determine the concentration of the HCl solution. the capital M is molar mass right? but i thught that was constant so how can it be 0.1200 M NaOH...

when all the products are reatants are soluble there is no precipitate right?

and I have another question If 3.45 x 10^23 formula units of Hg(NO3)2 are reacted with excess of Na2S, what mass of HgS can be expected if this process occurs with 97% yield? What are fomula units? you would do that question the same way as the previous one right?

^ Thanks #mols of C6H6 n=m/M n=12.8g/78.06g/mol n=0.164mol #mols of C6H5NO2 =0.164mol(0.70) =0.1148mol mass of C6H5NO2 m=nM m=0.1148mol(123.06g/mol) m=14.1g Like this?

the folowing reaction proceeds with a 70% yeild C6H6 + HNO3 = C6H5NO2 + H2O calculate the mass of C6H5NO2 expected if 12.8g of C6H5 reacts with excess HNO3 How do you do this problem?

^ ok, thank you

Hi, I need help with this question what is the molar concentration of 0.50 mol of NaCl dissolved in 0.30L of solution? =moles of solute/leters of solution =0.50mol/0.30L =1.7 mol/L Is this correct? and what mass of solute is present in 1.00L of 0.045 mol/L of Ca(oH)2, solution...

7. Suppose that you did not completely convert the hydrate to the anhydrous compound. Explain how this would affect the calculated percent by mass of water in the compound? If the hydrate was not completely converted to the anhydrous compound, the mass of anhydrous Cu(II)SO4 would increase...

^ok thanks

^thank you

lol, its ok i figured that part out i have different questions now Suppose you heated a sample of hydrated ionic compound in a test tube. What might you expect to see inside the test tube, near the mount of the test tube? Explain You would see water droplets and steam. This is because a...

what is the molecuar formula of CuSO4•xH2O? would it be CuSO4•5H2O?

calculate the precent by mass of water in a sample of hydrated copper (II) sulfate. mass of beaker-165.3g mass of beaker with bluestone-173.9g mass of dehydrated bluestone-170.7g Would this be a ballanced equation for this reaction? CuSO4•5H2O+ heat= CuSO4+5H2O so would you do this...

Hi, can some one pleas tell me how to do these questions? Thanks. How many atoms of C are in a mixture containing 0.237 mol of CO2 and 2.38 mol of CaC2? calclate the following the mass (g) of one atom of xenon the mass (g) of one mole of xenon atoms the number of atomic mass units in...