General Chemistry Answers

Draw the rough plot and

indicate the equivalence point.

Why the time of flow for 35% of PEG is much higher than that of 15% of PEG and water? Name the instrument used in its determination.

3.Calculate the volumeoccupied by 5.0 moles of nitrogen gas (N2) at 28°C and 2.05 atm in a disinfectant

aerosol spray.

2. Calculate the number of moles of oxygen(O2) in a 35.0 L ventilator cylinder at STP.

In the laboratory a general chemistry student finds that when 1.75 g of CoSO₄(s) are dissolved in 107.60 g of water, the temperature of the solution increases from 23.74 to 25.76 °C. 

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.74 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of CoSO₄(s) in kJ/mol. 

Assume the specific heat of the solution is equal to the specific heat of water.

Determine the equilibrium constant (kc) for the synthesis of PCl5 from PCl3 and Cl2 (PCl3 +Cl2 ⇌ PCl5).

Choose three among the five principles/rules in Atom's Electronic Structure. How would you discuss those you have chosen to a sixth grader in a manner that he/she can understand?

Indicate which of the following sets of quantum numbers in an atom are unacceptable, and explain why: (A) (1,0,1/2,1/2); (B) (3,0,0,+1/2); (C) (2,2,1,+1/2); (D) (4,3,-2,+1/2); (E) (3,2,1,1).

Provide the electron configuration for each element then determine the magnetic property of each.

1. Cl
2. Cu2+
3. Na+
4. O2-
5. Gd

Solve the problem with complete solutions.

At 298.15 K and 0.5 atm, the density of SO2 is 1.31 g/L. The rate of effusion of SO2 through a porous container is 0.27 L/min. (a) Find the density of an unknown gas that effuses through a porous container at the rate of 0.41 L/min under the same conditions. (b) Find the molar mass of the unknown gas.

Solve the problem with complete solutions.

A molecule of NH3 diffuses at 1.50 m from a point source. If a molecule of N2 would diffuse under the same condition for the same period, find the distance that a molecule of N2 will cover.