Question: Answer the following question given this paragraph: The molarity is 0.0129 M, the molality is 0.0129 m, the mole fraction is 2.33 10 , and the solution contains 1830 ppm Na2HPO4. Mole fraction is most useful for calculating vapor pressure, because Raoult's law states that the vapor pressure of a solution containing a non-volatile solute is equal to the mole fraction of solvent times the vapor pressure of the pure solvent. The mole fraction of the solvent is just one minus the mole fraction of solute. Q: The mole fraction of the solvent is just one minus the mole fraction of what? A:
OPTIONS:
- nutrients
- solution
- molecules
- solute
Answer: solute

input with options: Answer the following question given this paragraph: All chemical changes involve a transfer of energy. When zinc reacts with hydrochloric acid, the test tube becomes very warm as energy is released during the reaction. Some other reactions absorb energy. While energy changes are a potential sign of a chemical reaction, care must be taken to ensure that a chemical reaction is indeed taking place. Physical changes also involve a transfer of energy. Melting of a solid absorbs energy, while the condensation of a gas releases energy. The only way to be certain that a chemical reaction has taken place is to test the composition of the substances after the change has taken place to see if they are different from the starting substances. Q: All chemical changes involve a transfer of what? A:
OPTIONS:
- hydrogen
- pressure
- nitrogen
- energy
output: energy

Q: Answer the following question given this paragraph: Unit cells occur in many different varieties. As one example, the cubic crystal system is composed of three different types of unit cells: (1) simple cubic , (2) face-centered cubic , and (3) body-centered cubic . These are shown in three different ways in the Figure below . Q: The cubic crystal system is composed of how many different types of unit cells? A:

OPTIONS:
- one
- four
- five
- three

A: three

input: OPTIONS:
- ten
- three
- four
- two Now, answer this question: Answer the following question given this paragraph: More than one force may act on an object at the same time. In fact, just about all objects on Earth have at least two forces acting on them at all times. One force is gravity, which pulls objects down toward the center of Earth. The other force is an upward force that may be provided by the ground or other surface. Q: How many forces do objects on earth have acting on them at all times? A:
A:
output: two

Answer the following question given this paragraph: The kidneys filter all the blood in the body many times each day and produce a total of about 1.5 liters of urine . The kidneys control the amount of water, ions, and other substances in the blood by excreting more or less of them in urine. The kidneys also secrete hormones that help maintain homeostasis. Erythropoietin , for example, is a kidney hormone that stimulates bone marrow to produce red blood cells when more are needed. They also secrete renin, which regulates blood pressure, and calcitriol, the active form of vitamin D, which helps maintain calcium for bones. The kidneys themselves are also regulated by hormones. For example, antidiuretic hormone from the hypothalamus stimulates the kidneys to produce more concentrated urine when the body is low on water. Q: Which organ in the human body filters blood and excretes urine? A:

OPTIONS:
- the liver
- the bladder
- the thyroid
- the kidney

Answer: the kidney

Q: Answer the following question given this paragraph: Describing the flow of energy within an ecosystem essentially answers this question. To survive, one must eat. Why? To get energy. Food chains and webs describe the transfer of energy within an ecosystem, from one organism to another. In other words, they show who eats whom. Q: Food chains and what describe the transfer of energy within an ecosystem, from one organism to another? A:

OPTIONS:
- spider webs
- fuel webs
- the webs
- food webs

A:
food webs