Chemistry Answers

Calculate the maximum numbers of moles and grams of iodic acid (HIO₃) that can form when 631 g of iodine trichloride reacts with 169.4 g of water:

ICl₃ + H₂O → ICl + HIO₃ + HCl

what is the time required to pass 1 F of electricity through electrolyte with a current of 0.35 ampere

Determine the percentage composition of the elements is sodium chloride (NaCl) or table salt.

• what is the mass in grams of 1.204 x 10²³ molecules of H2O?

• how many formula units are there in 0.175 g of LiF

Calculate the total hardness of a sample of water containing following impurities 16.2 

mg/L of Ca(HCO3)2, 11.1 mg/L of CaCl2, 60 mg/L of CaSO4 and Mg(HCO3)2, 11.2 mg/L 

of MgCl2, 60 mg/L of MgSO4 and 19 mg/L of Mg(NO3)2.

How many moles of water are equal to 1.204 x 10²³ molecules of H2O?

provide a solution.

1. In acidic solution, dichromate ion oxidizes 0xalic acid, H2C2O4 (aq), to CO2 (g) in a reaction with Eocell =1.81V.

Cr2O72-(aq) +  3 H2C2O4(aq)  +  8H+(aq) →  2Cr3+(aq)  + 7H2O +  6CO2(g) ,

Which formula listed below is a polyatomic ion?

Select one:

a. Na+Cl–

b. None of the above

c. HCl

d. H₂SO₄

Write a balanced chemical equation, including phases, for the single displacement reaction you observed in Experiment 3. Be sure that the reaction products make sense based on your observations.

Compare 1.0 mol/L sodium hydroxide with 1.0 mol/L ammonia (written as ammonium hydroxide) by recreating similar diagrams of dissociation and concentration as those provided to you for the acid comparison. Assume ammonia dissociates only 1%. What would you expect to see if you tested the conductivity and pH of each? Why is there a difference in reactivity if there is 1 mole of acid in a given litre?