Haley B.

The Rydberg constant for Li+2 is 2.18 x 10-18 J. What is the longest and shortest wavelengths seen in the visible absorption spectrum of Li+2 at ordinary temperatures? Also, calculate the... more

At STP, air can be considered to be a mixture of ideal gases: 21.1% O₂, 78.0% N₂ and 1.00% Ar by volume.   a) Calculate the partial pressure of each... more

Two containers of the same volume are evaluated. Container 1 is maintained at a temperature of 400 K and filled with oxygen gas to a pressure of 750 mm Hg. Container 2 is maintained at a... more

A 2.50L container at 17.0 °C contains a mixture of three gases, N2, He, and CO2, at partial pressure of 0.32 atm, 0.25 atm and 0.4 atm respectively.    a) calculate the total pressure of the gas... more

Using the Ideal Gas equation I calculated a temperature of 162K, and with the Van der Waals equation 177K. I need to find the percent deviation from ideality.   Is this correct?   177-162    x... more

A 0.464g sample of a compound containing the elements carbon, hydrogen, oxygen and sulphur was burned completely, yielding 0.969g CO2 and 0.198g H2O. In a separate experiment, all the sulphur in... more

A sample of DNA was found to have a density of 1.10 g/cm3 and a molecular weight of approx. 3.04 x 108 g/mol. What is the average volume in mL occupied by one mol of DNA molecules and one DNA... more

If tan theta < 0 and sin theta = 8/17, what are the exact values of the other two trig ratios? What is the reference angle and terminal angle?

After a football is kicked it reaches a maximum height of 14 meters and it hits the ground 32 meters from where it was kicked. create an equation that represents the path of the football.

How do I find the restriction on the variables when there are two in the equation? x-2y>6

An airplane makes a 1200km flight with a tailwind, and returns flying into the same wind. The total flying time is 4 hours 50 minutes, and the airplane's speed in still air is 500km/h. What is the... more

The sum of the squares of three consecutive integers is 194. Find the integers using an algebraic method.

The hypotenuse of a right triangle is 8cm long. The sum of the lengths of the legs is 10cm. If one of the legs is x cm long, write an equation to represent the relationship between the hypotenuse... more

A picture frame measuring 30cm by 20cm has a border thickness of x cm all around. What is the simplified expression that would be used to find the area of the picture inside?

A company sells bolts for $0.95, selling approx. 10,000 bolts per month. For every $0.15 increase in price, the company will sell 500 fewer bolts. determine the price of the bolt that will maximize... more

y-intercept -6.75, x-intercept 1, equation of axis of symmetry x-5=0