General Chemistry Answers

Calculate the number of moles of NaOH used in the reaction

Determine the amount of heat in kj given off when 5.43x10^5 g of NO2 are produced

>2NO (g) = O2 (g) → 2NO2 (g)

>ΔH=-114.6kJ/mol

1) What volume of 2.25M H₂SO₄ should be diluted with water to form a 1.25L of 1.50M acid?

2) What is the concentration of the original solution if 450 mL; a certain solution is diluted in 750 mL water to form 2.0L of 1.50M HCl?

the reaction of NH3 and O2 forms NO and water. the NO can be used to convert P4 to P4O6, forming N2 in the process. the P4O6 can be treated with water to form H3PO3, which forms PH3 and H3PO4 when heated. how many grams of NH3 are needed to produce 20.44 g of PH3?

the reaction of NH3 and O2 forms NO and water. the NO can be used to convert P4 to P4O6, forming N2 in the process. the P4O6 can be treated with water to form H3PO3, which forms PH3 and H3PO4 when heated. how many grams of NH3 are needed to produce 20.44 g of Ph3?

the concentration of an antibacterial component in a disinfectant solution was found to be 10.2% by mass, with a density of 1.05 g/mL. in 2.50 L of disinfectant solution, how many grams of the antibacterial compound are present?

1. What is the molar concentration of Aki’s disinfectant if she dissolved 5Tbsp. of

NaClO (sodium hypochlorite) in 3.8 liters of H2O (water)?

2. Compute for the molality of her disinfectant if she dissolved 5Tbsp. of NaClO

(sodium hypochlorite) in 3.8 liters of H2O (water).

3. Calculate the percent by mass of sodium hypochorite in her disinfectant solution. (

5Tbsp. of NaClO (sodium hypochlorite) and 3.8 liters of H2O (water). In units of grams

for both of the solute and solvent.

4. Calculate the mole fraction of sodium hypochorite and water in Aki’s solution. (

5Tbsp. of NaClO (sodium hypochlorite) and 3.8 liters of H2O (water).

5. Calculate the percent by volume of the disinfectant Aki made. Units in mL.

6. What is the concentration of her solution in parts per million? ( 5Tbsp. of NaClO

(sodium hypochlorite) and 3.8 liters of H2O (water).

when stored in containers made of sodium silicate, hydrofluoric acid attacks the container to give hexafluorosilicic acid, sodium fluoride and water. write and balance the reaction between sodium silicate and hydrofluoric acid. how many grams of hydrofluoric acid is needed to completely dissolve a 100.0-gram weighing beaker made of sodium silicate?

multiple rivers that are carrying water from melting snow from many mountains to feed Van Lake during springtime. these mountains get around 1.96 km^3 snowfall through winter. if all the snow melts at once, calculate the change in the water level of Van Lake in meters? ( Van Lake surface area: 3713 km^2 , d(snow) = 0.92 g/cm^3 , d(water) = 1.0 g/cm^3 )

Use the half-reaction method to balance the following equation and then identify the oxidizing and reducing agents:

Fe(OH)2 (s) + Pb(OH)3 -(aq) → Fe(OH)3 (s) + Pb(s) [basic