Molecules that resemble fats but contain phosphate functional groups are called: a. steroids. b. polypeptides. c. phospholipids. d. nucleic acid.

A certain weak acid, ha, has a ka value of 7.1*10-7. part a calculate the percent ionization of ha in a 0.10 m solution.

Who thought everything was madee from fire earth air and water

How could a blood test reveal what foods a person has eaten? * A. The blood would contain particles of undigested food. B. The blood would change color based on the type of food. C. The blood would contain nutrients absorbed from the food. D.

Which of the following describes a response to external stimuli? a boy sneezes when exposed to cat dander a girl eats food when she is hungry a child becomes hyperactive due to a chemical imbalance a person yawns when oxygen levels in the blood are

A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.68 atm and 0.35 atm, respectively. Wha t is the partial pressure of the third gas, helium?

How do the products and reactants of a chemical change compare? The mass of the products is greater than the mass of the reactants because energy is taken in by the reaction.

Calculate the molecular mass of ferric oxide (FE3O4)

Which of the following is a technique used in relative dating? Beta decay Index fossil correlation Isotope ratios Radiocarbon dating

Methanol enters a distillation column at 43 c. the column does not have a reboiler and uses open steam for heating. the column is at 101.3 kpa. the steam is pure water and is a saturated vapor.

The wavelength of a specific in the infared is 4 x 10^-6 meters. given that the speed of light is 2.998 x 10^8 m/s, what should be the frequency of this infrared wave?