13. (WCSP[x], 6 points) Draw three constitutional isomers of the molecular formula of C5H10O.   Isomer A should include a aldehyde. Isomer B should include an alcohol. Isomer C there are no requirements!  Get creative! Give the number of sigma bonds in Isomer A in the box below.   

A pediatric patient is brought to the clinic with acute onset of bilateral conjunctival redness, tearing, and crusting around the eyes. Several classmates have developed similar symptoms. A conjunctival swab is collected for culture. Gram stain shows small, pleomorphic gram-negative coccobacilli. What is the most common cause of the described illness?

(WCSP25)  The cross sections of three different ionic compounds (labeled Compound 1, 2 and 3) are displayed in the figures below. In the figures, the charge on each ion is indicated, and the diameter of each circle reflects the diameter of each ion.    Rank these compounds in order of increasing melting point. lowest [drop1] < [drop2] < [drop3] highest

[20pts] Consider the 3rd order ODE y”’-3y”=0 a) Write down the auxiliary equation and solve it  (justify your answer) b) Find the general solution of the differential equation c)  Find the solution that satisfies the initial values ,  y'(0)=4, y”(0)=6        Note: You must show all your work to deserve the full credit assigned to any question. y,

A ship travels 55 km on a bearing of

What type of statement is “It is either raining or not raining”?

Find the values of sine, cosine and tangent functions for the angle 

Suppose ABC is a right triangle with sides of lengths a, b and c and right angle at C. Solve the triangle if a = 12, and b = 35.

What is the truth value of (p ∧ ~q) if p is true and q is false?

If p is false and q is true, what is the truth value of p ∨ q?