Write a simplified expression in terms c, for the area of the given triangle.

c-1/c^2-c-12 

c+3/c^2-5c+4

 Write a balanced equation for the formation of copper(II) oxide at standard state.  Include the enthalpy change as an energy term in the balanced equation.   

Write a balanced equation for the simple decomposition of iron(II) oxide at standard state.  Include the enthalpy change as an energy term in the balanced equation.   

 question  1. 

Calculate the enthalpy of reaction for the reaction of nitrogen dioxide with water represented by the following equation:  

3 NO2(g) + H2O(l) →2 HNO3(aq) + NO(g)                  ?rH=?

questiion  2 

Nitrogen monoxide gas, which is used to treat some pulmonary diseases, is transported in pressurized gas cylinders.  Nitrogen monoxide gas is produced by reacting ammonia gas and oxygen gas, as represented by the following equation. 4 NH3(g) + 5 O2 (g)→ 4 NO(g) + 6 H2O(g)     

 Calculate the standard enthalpy of reaction for the above equation.    

Top fuel dragsters (sometimes called funny cars) burn nitromethane.  This combustion is represented by the equation below.  

4 CH3NO2(l) + 3 O2(g)→ 4 CO2(g) + 6H2O(g) + 2N2(g)   

?cH = -1418.4 kJ    

16. Calculate the molar enthalpy of combustion for nitromethane.   

17.   A  5.00 g sample of nitromethane was burned in a calorimeter that  contained 250 g of water at 20.5 degrees celcius.  Calculate the final temperature of the water if all 5.00 g of nitromethane is combusted.

Hint – you will need to use the molar enthalpy of combustion that you calculated in Question 16. 

In an experiment, a student heated 550 g of water from 25oC to 91oC using 0.13 g of glycerol monostearate, an emulsifying agent used in the production of margarine.  If it is assumed that all the heat energy was absorbed by the calorimeter water, calculate the experimental enthalpy of combustion for glycerol monostearate in kJ/g.   

 The kinetic energy of a moving object is related to its mass and velocity by the formula Ek=1/3mv^2, where Ek  is the kinetic energy in Jules, m is the mass of the object in kilograms, v is the objects velocity in metres per second.  what are the possible velocities for a 3kg object  with a kinetic energy of less than 600 J? ( negative velocities are acceptable and represent the opposite direction of a positive velocity)

a clothing store is holding a buy one, get one half off sale for tshirts, where the second tshirt purchased is half the original price.

a; let b be the cost to the store to buy the shirts, and let s be the original selling price. write an inequality relating the two variables such that the store profits more from a customer purchasing two T-shirts then from a customer purchasing one.(hint: the expression s-b represents the profit when one shirt is purchased. What is an expression for the profit when two shirts are purchased?)

b; isolate b in the inequality. explain what the inequality says about the buying and selling prices

c; if the store buys tshirts for 12$, what selling price range will make selling two tshirts more profitable that selling one shirt

an incorrect definition of an absolute value is

A: |x|= x for x>0, 0 for x=0, -x for x<0

B: |x|= x for x > or equal 0, -x for x<0

C: |x|= x for x>0, -x for x< or equal 0

D: |x|= x for x>0, -x for x<0

Draw a condensed structural diagram of 1,3-diethylbenzene. ( note can use a line diagram to represent benzene)

adding, subtracting, multiplying, and dividing rational expressions are similar to performing the same operations on rational numbers. Using examples for each operation, support this statement.