Mable

A drug company is testing new toothpaste in 2 flavors, regular and cinnamon. In a sample of 193 people, 121 liked regular, 112 people liked cinnamon, and 46 liked both.

12 years ago

What functional group(s) must be present in a monomer of a condensation reaction?

17 years ago

Explain in terms of molecular structure why sugars have a relatively high melting point compared to hydrocarbons of a similar size.

17 years ago

What types of linkage joins the nucleotides a) within a single DNA strand and b) between two single DNA strands?

17 years ago

Construct the following using molecules of your choice: a) a polyester and b) a polyamide. Each drawing should have four monomers and should be original in its structure. Your polymers can not be biochemical (carbohydrate, lipid, protein, etc.). Identify...

17 years ago

Draw three repeating units of the condensation polymer made from ethanedioic acid and ethanediol. if anyone has a weblink that illustrates this may you please send it?

17 years ago

Esters are A.found in some medicines B.often fragrant C.essential oils in fruits and flower D.found in some types of flavorings E.all answers are correct

17 years ago

The melting point of a compound is not influenced by which of the following? A. polarity B. electronegativity of its atoms C. Van der Waals forces D. hydrogen bonds E. isotope of carbon

17 years ago

Carbon is able to form large numbers of organic compounds because carbon can A.form 4 bonds B.form single, double and triple bonds C.form chains, rings, spheres and sheets D.the carbon-carbon bond is very stable E.all answers are correct

17 years ago

The compound with the highest boiling point will be which of the following? A.CH3Cl B.CH3Br C.CH4 D.CH3F

17 years ago

How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254g B. 127g D. 42.3g E. 31.8g

17 years ago

calculating the current ratio of the XYZ nonprofit corporation balance sheet using appendix b.

16 years ago

Car A with a mass of 1000kg is travelling east at 25m/s when it collides with car B, 2000kg, travelling north at 15m/s. After the collision, the two cars stick together and have the same velocity. Assume that they slide without friction after collision. (...

8 years ago

a stone that is thrown near the surface of the earth. There is no air resistance. Position increases in the up direction. The initial velocity is 30 m/s at 30 degrees above the horizontal. what is the velocity when the stone reaches its maximum height ? w...

8 years ago

One litre of water at 0 degrees Celsius will have a different volume at higher temperatures. For a temperature 0 ≤ T ≤ 30 (in Celsius) this volume (in litres) is well approximated by the function V = −aT 3 + bT 2 − cT + 1 using the coefficients a = 9.8 ×...

8 years ago

w(t)= f(t)/(c+t) w'(t)=? I got f'(t)(c+t)-f(t)/(c+t)^2 as the derivative and I'm having a hard time trying to prove that f(t_0) = f'(t_0) (C+t_0) Help is always appreciated :)

8 years ago

it is assumed that f is differentiable and that w has an absolute maximum at t0 w(t)= f(t)/(c+t) derivative is f'(t)(c+t)-f(t)/(c+t)^2 Show that f(t0) = f′(t0)(C + t0). I'm having a bit of trouble in the above question. I keep getting f(t0)= (c+t0)-f'(t0)...

8 years ago

A rectangle is inscribed into a semi circle at radius 2. What is the largest area it can have and what are the dimensions Answers Area= 4 max base =2sqrt2 height = sqrt2 Help is always appreciated :)

8 years ago

Suppose A light ray starts at the point A = (0,a) in an uniform medium 1 where the speed of light is c1 and then passes through an uniform medium 2 where the speed of light is c2 reaching point B = (d, −b). The line separating the two media is the x-axis;...

8 years ago

Explain in terms of molecular structure why sugars have a relatively high melting point compared to hydrocarbons of a similar size.

17 years ago

(1) x-y=-11 (2) y+7=-2x rearrange the equation 1 to get y by itself -> x=-11+y substitute that in equation 2 y+7=-2(-11+y) and solve for y

8 years ago

it is assumed that f is differentiable and that w has an absolute maximum at t0 Show that f(t0) = f′(t0)(C + t0).

8 years ago

collect like terms and simplify 4x^2-5x^2=-x^2 -3x=8x-11x 8=6+2 final answer : -x^2-3x +8

8 years ago

collect like terms -- remember that double negatives makes a positive

8 years ago