General Chemistry Answers

For a reaction system at chemical equilibrium that includes some, but not all, gaseous species

the reaction is always shifted to side with largest total moles of only gas species

the reaction is always shifted to the left if the pressure increases

the reaction is always shifted to side with fewest total moles of all species

the reaction is always shifted to side to reduce gaseous matter interactions

the reaction is always shifted due to molar mass of species due to a kinetic molecular theory postulate

the reaction is always shifted to side with smallest total moles of all species

the reaction is always shifted to side with smallest total moles of only gas species

the reaction is always shifted due to a kinetic molecular theory postulate to minimize repulsions

 calculate the formal charges on O atoms and P atom

Define the relation of the unit cell parameter and the atomic rafius

“If plum pudding model of atom would be valid, then producing cathode ray and electricity would be a myth”- justify these statement with scientific facts and logical approach in bullet points only. [100 words]

What is the geometry of H2S

For the following species: Zn2+ and Na

i) Write the electronic configuration using noble gas notation.  

ii) Draw the partial orbital box diagram showing valence electrons for the above species (Zn2+ and Na), and indicate whether they are paramagnetic or diamagnetic.

H₂CO₃+NH₄OH->(NH₄)₂CO₃+H₂O

50.0 g of C3H8 reacts with 50.0 g of O2 to produce CO2 and H2O. The limiting reactant is O2. The equation for the reaction is

C3H8 (g) + 5O2 (g)  3CO2 (g) + 4H2O (l)

a) What is the significance of the limiting reagent in predicting the amount of the product obtained in a reaction?

b) Calculate the theoretical yield (in grams) of water (H2O) that would form according to the above chemical reaction.

c) If the percentage yield of water (H2O) in the above reaction is 88.5 %, calculate the experimental yield of water (in grams).

d) Calculate the moles and mass of excess reactant remaining at the end of the reacti

Consider the reaction:

2NO(g)+Br2(g)⇌2NOBr(g) Kp=28.4 at 298 K

In a reaction mixture at equilibrium, the partial pressure of NO is 107 torr and that of Br2

is 122 torr. What is the partial pressure of NOBr in this mixture?

Calculate the oxidation of Cr in Cr₂O₇^2-