Monday
May 20, 2013

Total # Posts: 177

History - Italy
What is the history of the Italian sports of soccer and football. Is Italian football the same as American soccer? If so, what is Italian soccer? Thanks for your help.

Physics
If a baseball falls a vertical distance of 2.6 m from the first to the last image, what is the time interval between the first and last image?

basic math
34%

chemistry
the question was to check all that apply: BO33- H+ H3BO22+ O2- H3BO3 OH -

chemistry
what are the solute particles present in boric acid (H3BO3)?

chemistry
CrCl3(s) + AgNO3 (aq)= AgCl(s) + Cr(NO3)3(aq) A 0.750 g sample of impure CrCl3 was removed from a bottle that contained 1.75 g of impure sample. The removed sample was dissolved in water and required 42.5 mL of 0.215 M AgNO3 solution to react with the CrCl3 in the sample. What...

chemistry
Al(s) + H2SO4(aq)-> Al2(SO4)3(aq) + H2(g) Consider the unbalanced equation above. What volume of 0.490 M H2SO4 is needed to react with excess aluminum to produce 1.60 g of Al2(SO4)3? Use a molar mass with at least as many significant figures as the data given.

chemistry
H2SO4(aq) + NaOH(aq)-> Na2SO4(aq) + H2O(l) Consider the unbalanced equation above. What is the concentration of the original sulfuric acid solution if 60.5 mL of the acid reacts with 18.0 mL of 0.110 M sodium hydroxide?

chemistry
If 180.0 mL of 0.270 M NaOH are mixed with 230.0 mL of 0.500 M NaOH, what is the molarity of the final solution? Assume the volumes are additive.

chemistry
How many mL of 4.50 M NaOH must be diluted to produce 160.0 mL of 2.50 M NaOH?

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