Answer the following question given this paragraph: Ionic and covalent compounds are held together by electrostatic attractions between oppositely charged particles. Describe the differences in the nature of the attractions in ionic and covalent compounds. Which class of compounds contains pairs of electrons shared between bonded atoms?. Q: What holds ionic and covalent compounds together? Choices: - gravity - water - magnetic force - electrostatic attractions A:
electrostatic attractions
(Question)
Answer the following question given this paragraph: The stoichiometry of a reaction describes the relative amounts of reactants and products in a balanced chemical equation. A stoichiometric quantity of a reactant is the amount necessary to react completely with the other reactant(s). If a quantity of a reactant remains unconsumed after complete reaction has occurred, it is in excess. The reactant that is consumed first and limits the amount of product(s) that can be obtained is the limiting reactant. To identify the limiting reactant, calculate the number of moles of each reactant present and compare this ratio to the mole ratio of the reactants in the balanced chemical equation. The maximum amount of product(s) that can be obtained in a reaction from a given amount of reactant(s) is the theoretical yield of the reaction. The actual yieldis the amount of product(s) actually obtained in the reaction; it cannot exceed the theoretical yield. The percent yield of a reaction is the ratio of the actual yield to the theoretical yield, expressed as a percentage. Q: If a quantity of a reactant remains unconsumed after complete reaction has occurred, it is? Choices: - reduced - static - missing - in excess A:
(Answer)
in excess
Ques: Answer the following question given this paragraph: The Fujita scale measures tornado intensity based on wind speed and damage. Q: The fujita scale measures the intensity of what weather event, based on wind speed and damage? Choices: - sandstorm - wind gust - blizzard - tornado A:
Ans: tornado
(Q).
Answer the following question given this paragraph: One seismogram indicates the distance to the epicenter. This is determined by the P-and S-wave arrival times. If a quake is near the seismograph, the S-waves arrive shortly after the P-waves. If a quake is far from the seismograph, the P-waves arrive long before the S-waves. The longer the time is between the P-and S-wave arrivals, the further away the earthquake was from the seismograph. First, seismologists calculate the arrival time difference. Then they know the distance to the epicenter from that seismograph. Q: One seismogram indicates the distance to the what? Choices: - researchers - houses - the moon - epicenter A:
(A).
epicenter
Ques:Answer the following question given this paragraph: Blood Vessels The blood from the heart is carried through the body by a complex network of blood vessels (Figure 16.12). Arteries take blood away from the heart. The main artery of the systemic circulation is the aorta; it branches into major arteries that take blood to different limbs and organs. The aorta and arteries near the heart have heavy but elastic walls that respond to and smooth out the pressure differences caused by the beating heart. Arteries farther away from the heart have more muscle tissue in their walls that can constrict to affect flow rates of blood. The major arteries diverge into minor arteries, and then smaller vessels called arterioles, to reach more deeply into the muscles and organs of the body. Arterioles diverge into capillary beds. Capillary beds contain a large number, 10's to 100's of capillaries that branch among the cells of the body. Capillaries are narrow-diameter tubes that can fit single red blood cells and are the sites for the exchange of nutrients, waste, and oxygen with tissues at the cellular level. Fluid also leaks from the blood into the interstitial space from the capillaries. The capillaries converge again into venules that connect to minor veins that finally connect to. Q: What is the main artery of the systematic circulation called? Choices: - femoral - subclavian - carotid - aorta A:

Ans:aorta
Question: Answer the following question given this paragraph: Peripheral membrane proteins are proteins that are only temporarily associated with the membrane. They can be easily removed, which allows them to be involved in cell signaling. Peripheral proteins can also be attached to integral membrane proteins, or they can stick into a small portion of the lipid bilayer by themselves. Peripheral membrane proteins are often associated with ion channels and transmembrane receptors. Most peripheral membrane proteins are hydrophilic. Q: What type of proteins are only temporarily associated with the membrane? Choices: - visual membrane proteins - sensitive rod proteins - peripheral oxidation proteins - peripheral membrane proteins A:
Answer:
peripheral membrane proteins