Conner

Molecule with infrared absorptions near 1600 cm-1 and 1800 cm-1

a) CH3CH2OH b) CH3CH2COCH3 c) CH2CHCOCH3 d) CH3OCH2CH2OH

Determine all of the solutions in the interval 0° ≤ θ < 360°. (Enter your answers as a comma-separated list. Round your answers to one decimal place.)

62 sin^2(θ) − cos(2θ) = 0

Theta = ______ degrees

If tan = 1/12 and tan β = 11/13, find + β, given that 0 < < π/2 and 0 < β < π/2. Hint: Compute tan( + β).

I have to find cos x = 0.488 in the interval (0, 2pi). There should be two answers and I can use a calculator. I found the first number (1.07) but I have no idea how to find the second. Help?

At 25°C, Kp 1 10-31 for the reaction below.

N2(g) + O2(g) 2 NO(g)

(c) Calculate the value of K* for this reaction. (The term K* indicates the use of molecules/cm3 for concentration.)

Suppose that ΔABC is a right triangle with C = 90°.

If AC = 1 and BC = 5/12, compute each quantity. (Enter your answers in exact form.)

(tan A)(tan B)

______?

Can't get the right answer to save my life lol

The half-life of thorium-229 is 7340 years.

(a) Compute the time required for a given sample to be reduced by a factor of 500. (Round your answer to the nearest whole number.)

___yr

(b) Express your answer in part (a) in terms of half-lives. (Round your answer to the nearest whole number.)

___ half-lives

(c) Using half-lives as in Example 7(b), estimate the time required for a given sample for thorium-229 to be reduced by a factor of 500. (Round your answer to the nearest whole number.)

___ yr

I get $.50 but apparently that's wrong. What do you all think?

Your friend invests $2000 at 5 1/4% per annum compounded semiannually. You invest an equal amount at the same yearly rate, but compounded daily. How much larger is your account than your friend's after 6 years? (Round your answer to two decimal places.)

Hey guys! I just have to solve for x. HELP!

log2(3x^2 + 1) = 4

log5 x + log5(x + 7) = 0

log2(x + a) − log2(x − a) = 1