Other Chemistry Answers

Hydrogen gas in a closed container exerts a pressure of 84kPa. Determine the pressure in atmospheres

5Br−(aq)+BrO−3(aq)+6H+(aq)→3Br2(aq)+3H2O(l)


The average rate of consumption of Br− is 1.06×10−4 M/s over the first two minutes. What is the average rate of formation of Br2 during the same time interval?

If I use 2 mol NaOH to make 1 liter of solution, what is the molarity of the solution?

Calculate the quantity of H+ions present in 200 cm3 of a solution of nitric acid with a concentration of 0,25mol.dm -3

2. What is the molar concentration of a AgNO3 solution if 16.35-mL react with:

a) 0.3017-g KIO3 ANSWER: 0.08623 M AgNO3

b) 12.33 mL of 0.02149 M K4Fe(CN)6 ANSWER: 0.06482 M AgNO3

Molar masses: KIO3 = 214.0 K4Fe(CN)6 = 368.4

A student was assigned to recrystallize an impure sample of benzoic acid. he obtained 3.2g of pure benzoic acid from 5g of the sample. calculate the % yield of recrystallized (pure) benzoic acid.

A balloon is filled with 10 L of air at a pressure of 1400 torr. What is the pressure of the balloon if the volume is changed to 5 L?

How much energy (in joules) will be given off from the following reaction, if 3.0g of sodium reacts with 1.2g of nitrogen in the following reaction? 2Na+ N2 ——> 2NaN3 delta H= -42.7kJ

Iodine dissolves in an aqueous solution of iodine ion's to form triiodide .this ion's consist of one one iodine atom bonded to two others. Describe the bonding of triiodide in terms of valance bond theory ?

Explain wind powered electrolysis