OAT PREP PRACTICE QUESTIONS WITH GUARANTEED ACCURATE ANSWERS |VERIFIED

Evaluate 2/x+(5/y/x/4)+6/7 when x=3 and y=6 - ACCURATE ANSWERS 14/15 what makes up a pyrimadine? - ACCURATE ANSWERS a nitrogen at the 1 and 5 position in the structure. If one parent has the genotype AABb and the other has the genotype AaBB, what is the chance of a child being homozygous recessive for both traits? - ACCURATE ANSWERS 0% If one kilometer is 62% of a mile, what is 21/5miles in kilometers and meters, to the nearest meter? - ACCURATE ANSWERS 3 kilometers, 548 meters Which germ layer of the human embryo gives rise to the lining of the esophagus? - ACCURATE ANSWERS Endoderm The half-life of the radioactive element Weissonium is 6 days. How much of an original sample of 30 grams will have decayed after 24 days? - ACCURATE ANSWERS 28 1/8g In the pyramid of energy, the greatest amount of stored chemical bond energy is found in - ACCURATE ANSWERS Primary producers x + 1⁄y - y + 1⁄x ? - ACCURATE ANSWERS (x+y+1)(x-y)/xy Which of the following is most nearly equal to 479.93⁄.00598? - ACCURATE ANSWERS 80,000 Which of the following is the weakest base in aqueous solution? - ACCURATE ANSWERS HSO4- At 760 torr, solution X boils at 100.26 °C and solution Y boils at 101.04 °C. If both aqueous solutions contain the same nonvolatile solute, which of the following statements must be true? - ACCURATE ANSWERS The vapor pressure of solution X is higher than that of solution Y at 25 °C. Which of the follow is equivalent to 6!⁄4! (This is a factorial question). - ACCURATE ANSWERS 5!/4 Which of the following occurs during synapsis? - ACCURATE ANSWERS Homologous chromosomes come together and intertwine Justin requires 5 hours to paint a certain room. Suzanne requires 3 hours to paint the same room. If Justin and Suzanne work together, how long will it take them to paint 1⁄3 of the room? - ACCURATE ANSWERS This question involves two steps: [Product of individual times/ sum of individual times] straightforward use of the work formula and then a manipulation of the result. If the two people, working independently, need five hours and three hours to paint the room, then, working together, they'd need hours to complete the entire room. But since we're concerned with the time they'd need to complete only of the room, we can say that they'd need of ,. Which of the following statements is true of ethene? - ACCURATE ANSWERS Both carbon atoms are sp2 hybridized and the molecule is planar. Conduction - ACCURATE ANSWERS direct transfer of energy from molecule to molecule via direct molecular collsions What are the best and worst conductors? - ACCURATE ANSWERS Worst= gases Best= metals Convection - ACCURATE ANSWERS heat transfer by physical motion; only takes place in fluids and gases. Heat energy is transferred AWAY from the source. Radiation - ACCURATE ANSWERS transfer of energy by electromagnetic waves. Radiation can travel through a hard vacuum. Ex: energy from sun specific heat - ACCURATE ANSWERS c, amount of heat energy needed to raise the temperature of 1kg by on degree K. What is the specific heat of water? - ACCURATE ANSWERS 4186 J/kg*K Heat transfer formula - ACCURATE ANSWERS Q=mc(Tf-Ti) Heat of transformation from solid to liquid - ACCURATE ANSWERS heat of fusion Heat of transformation from liquid to gas - ACCURATE ANSWERS heat of vaporization Temperature Definition - ACCURATE ANSWERS average kinetic energy of the system Pressure definition - ACCURATE ANSWERS Force per unit surface area (F/A) STP Conditions - ACCURATE ANSWERS 273 K 1 atm 1 mole gas --> 22.4 L Ideal Gas law - ACCURATE ANSWERS PV=nRT n= 8.31 J/K*mol Internal Energy of Monoatomic ideal gas - ACCURATE ANSWERS U = (3/2)nR(Tf-Ti) *if temperature stays constant, the internal energy stays constant* How does Q change when heat is added or removed from a system? - ACCURATE ANSWERS Heat added: Q>0