General Chemistry Answers

The oxyanions IO₂^- and ClO₄^- are respectively called:

A canister of butane gas (C4H10, MM=58.12 g/mol) used for portable cooking is available in a store in two sizes, 750 mL and 2.0 L.  The 750 mL canister contains 85 g of butane gas with a pressure of 48 atm at 28 C.  How many grams of butane gas are present in the bigger canister under the same condition of pressure and temperature?

5. A 0.400 mg initial sample of radioactive iodine–123, used to treat thyroid cancer, decreases to 0.113 mg after 24.0 hrs. Determine the half–life of iodine–123. 

How many liters of 0.55 M HCl is required to neutralize 1.10 g of sodium carbonate

(Na2CO3)? (molar mass of Na2CO3 = 105.99 g/mol)

2HCl + Na2CO3 → 2NaCl + H2CO3

An acid solution contains 18 kg of water and pure hydrochloric acid (HCl). Its

concentration is 0.60 mol/kg of solvent. Compute for the number of moles of solute contained in the solution

When 1.50 mol of CO2 and 1.50 mol H2 are placed in a 3.00-L container at 395ºC, the following reaction occurs: CO2(g) + H2(g) ↔ CO(g) + H2O(g).

If Kc = 0.802, what are the concentrations of each substance in the equilibrium mixture?

What is the normality of a 500 mL solution containing 1.63 g of Pb(NO3)2 and used to precipitate out PbS? Pb(NO3)2 has a formula weight of 331.20 g/mol. 

If 10 grams of butane(C4H10), afuel in cigarrete lighter, react with 10 grams of O2, how many grams of the product will be formed

how many moles of NaAlO₂ are produced if 126.4 g of NaOH reacts completely?

an aqueous solution of NaOH can dissolve an aluminum sheet in the reaction:

2 Al + 2 NaOH + 2H2O → 2 NaAlO₂ + 3H₂