Answer the following question given this paragraph: Molten Salts and Ionic Liquids Heating a salt to its melting point produces a molten salt. If we heated a sample of solid NaCl to its melting point of 801C, for example, it would melt to give a stable liquid that conducts electricity. The characteristics of molten salts other than electrical conductivity are their high heat capacity, ability to attain very high temperatures (over 700C) as a liquid, and utility as solvents because of their relatively low toxicity. Molten salts have many uses in industry and the laboratory. For example, in solar power towers in the desert of California, mirrors collect and focus sunlight to melt a mixture of sodium nitrite and sodium nitrate. The heat stored in the molten salt is used to produce steam that drives a steam turbine and a generator, thereby producing electricity from the sun for southern California. Due to their low toxicity and high thermal efficiency, molten salts have also been used in nuclear reactors to enable operation at temperatures greater than 750C. One prototype reactor tested in the 1950s used a fuel and a coolant consisting of molten fluoride salts, including NaF, ZrF 4, and UF4. Molten salts are also. Q: Ionic liquids heating a salt to its melting point produces a what? Choices: - table salt - plasma - gas - molten salt A:
molten salt
(Question)
Answer the following question given this paragraph: Carboxylic acids have high boiling points compared to other substances of comparable molar mass. Boiling points increase with molar mass. Q: Boiling points increase with which kind of mass? Choices: - lipid mass - universal mass - protons mass - molar mass A:
(Answer)
molar mass
Ques: Answer the following question given this paragraph: Q: What are the two ways animals can manage their internal environment? Choices: - digestion or excretion - sweating or sleeping - adaptation or mutation - regulating or conforming A:
Ans: regulating or conforming
(Q).
Answer the following question given this paragraph: Stems are needed for transport and storage. Their vascular tissue carries water and minerals from roots to leaves. It carries dissolved sugar from the leaves to the rest of the plant. Without this connection between roots and leaves, plants could not survive high above the ground in the air. In many plants, ground tissue in stems also stores food or water during cold or dry seasons. Q: What part of the plant, in general, is responsible for transport and storage of water and minerals? Choices: - leaves - pistil - petals - stems A:
(A).
stems
Ques:Answer the following question given this paragraph: (a) Initially, the system (a copper penny and concentrated nitric acid) is at atmospheric pressure. (b) When the penny is added to the nitric acid, the volume of NO2 gas that is formed causes the piston to move upward to maintain the system at atmospheric pressure. In doing so, the system is performing work on its surroundings. The symbol E in represents the internal energy of a system, which is the sum of the kinetic energy and potential energy of all its components. It is the change in internal energy that produces heat plus work. To measure the energy changes that occur in chemical reactions, chemists usually use a related thermodynamic quantity calledenthalpy (H) (from the Greek enthalpein, meaning "to warm"). The enthalpy of a system is defined as the sum of its internal energy E plus the product of its pressure Pand volume V:. Q: To measure what changes that occur in chemical reactions, chemists usually use a related thermodynamic quantity, calledenthalpy? Choices: - ion exchange - evaporation - entropy - energy A:

Ans:energy
Answer the following question given this paragraph: Currents are like rivers flowing through the ocean. Rivers always flow downhill because of gravity. What do you think causes ocean currents to flow?. Q: What causes rivers to always flow downhill? Choices: - slope - pressure - diffusion - gravity A:
gravity