General Chemistry Answers

An equal amount of ice cubes and boiling water was made to come in contact with each other and was left undisturbed in a room. What will be the approximate temperature of the mixture after 24 hours?

a. 75°C

b. 4°C

c. 50°C

d. 25°C

A tightly-closed chamber was built containing only black powder in a vacuum. A laser was fired at the powder and it melted. Determine the type of boundary the chamber upholds.

a. Adiabatic

b. Closed

c. Isolated

d. Diathermic

Calculate the amount of heat absorbed by a 250 mol water whose temperature was raised by 15°C. 

substances that held by London dispersion force

0.690 moles of solid CO2 is put in an empty sealed 4.40 L container at a temperature of 90ºC, what is the pressure in the container?

1) What are the three different kinds of rate equations?

2) How do these rate equations differ from one another?

3) How do you solve for these rate equation?

The decomposition of Nitrogen dioxide to Nitric Oxide and oxygen is an example of second-order reaction. It has a rate constant of 0.54 M^-1s^-1 at 300°C. (a) If the initial concentration of NO2 is 0.00800 M, what is the concentration of NO2 after 20.0 minutes? (b) initial concentration of NO2 is 0.00800 M, what is the half life?

Calculate the half-life for a first order reaction with a rate constant K 0.0045s^-1.

A 0.75 M initial concentration of a reactant is used up in a zero-order reaction. If the rate constant k is 0.015 M/min, (a) What will be the concentration of the reactant after 5 minutes? (b) How long will it take the concentration to be reduced to 0.06 M?

1) What are the factors that affect the chemical reaction?

2) How does these factors influence the rate of the chemical reaction?