Answer the following question given this paragraph: Dilution of the products with water, followed by filtration to remove calcium sulfate, gives a dilute acid solution contaminated with calcium dihydrogen phosphate, Ca(H2PO4)2, and other compounds associated with calcium phosphate rock. It is possible to prepare pure orthophosphoric acid by dissolving P4O10 in water. The action of water on P4O6, PCl3, PBr3, or PI3 forms phosphorous acid, H3PO3 (shown in Figure 18.53). The best method for preparing pure phosphorous acid is by hydrolyzing phosphorus trichloride: PCl 3(l) + 3H 2 O(l) H 3 PO 3(aq) + 3HCl(g) Heating the resulting solution expels the hydrogen chloride and leads to the evaporation of water. When sufficient water evaporates, white crystals of phosphorous acid will appear upon cooling. The crystals are deliquescent, very soluble in water, and have an odor like that of garlic. The solid melts at 70.1 C and decomposes at about 200 C by disproportionation into phosphine and orthophosphoric acid: 4H 3 PO 3(l) PH 3(g) + 3H 3 PO 4(l). Q: The best method for preparing pure phosphorous acid is by hydrolyzing what? A:
OPTIONS:
- dioxide trichloride
- carbon trichloride
- dioxide phosphat
- phosphorus trichloride

Answer: phosphorus trichloride

Question: Answer the following question given this paragraph: Although California is prone to many natural hazards, including volcanic eruptions at Mt. Shasta or Mt. Lassen, and landslides on coastal cliffs, the natural hazard the state is linked with is earthquakes. In this video, the boundaries between three different tectonic plates and the earthquakes that result from their interactions are explored. Q: What natural disaster is california most linked with? A:
OPTIONS:
- fires
- volcanoes
- hurricanes
- earthquakes
Answer: earthquakes

input with options: Answer the following question given this paragraph: At some point, the variation probably came from a mutation. A mutation is a random change in an organism's genes. Mutations are natural. Some are harmful, but many are neutral. If the trait from the mutation is beneficial, that organism may have a better chance to survive. An organism that survives is likely to have offspring. If it does, it may pass the mutation on to its offspring. The offspring may be more likely to survive. Q: A mutation is a random change in an organism's what? A:
OPTIONS:
- power
- structure
- babies
- genes
output: genes

Q: Answer the following question given this paragraph: The daughter cells then start to divide by meiosis . But they only go through the first of the two cell divisions of meiosis at that time. They go through the second stage of cell division after the female goes through puberty. Q: Daughter cells divide by what? A:

OPTIONS:
- electrolysis
- mitosis
- nucleus
- meiosis

A: meiosis

input: OPTIONS:
- solvents
- enzymes
- thermal agent
- oxidizing agent Now, answer this question: Answer the following question given this paragraph: In the reaction above, the zinc is being oxidized by losing electrons. However, there must be another substance present that gains those electrons and in this case that is the sulfur. In other words, the sulfur is causing the zinc to be oxidized. Sulfur is called the oxidizing agent. The zinc causes the sulfur to gain electrons and become reduced and so the zinc is called the reducing agent. The oxidizing agent is a substance that causes oxidation by accepting electrons. The reducing agent is a substance that causes reduction by losing electrons. The simplest way to think of this is that the oxidizing agent is the substance that is reduced, while the reducing agent is the substance that is oxidized. The sample problem below shows how to analyze a redox reaction. Q: What substance causes oxidation by accepting electrons? A:
A:
output: oxidizing agent

Question: Answer the following question given this paragraph: Respiratory Rate and Control of Ventilation Breathing usually occurs without thought, although at times you can consciously control it, such as when you swim under water, sing a song, or blow bubbles. The respiratory rate is the total number of breaths, or respiratory cycles, that occur each minute. Respiratory rate can be an important indicator of disease, as the rate may increase or decrease during an illness or in a disease condition. The respiratory rate is controlled by the respiratory center located within the medulla oblongata in the brain, which responds primarily to changes in carbon dioxide, oxygen, and pH levels in the blood. The normal respiratory rate of a child decreases from birth to adolescence. A child under 1 year of age has a normal respiratory rate between 30 and 60 breaths per minute, but by the time a child is about 10 years old, the normal rate is closer to 18 to 30. By adolescence, the normal respiratory rate is similar to that of adults, 12 to 18 breaths per minute. Q: The normal respiratory rate per minute in adult humans is? A:
OPTIONS:
- 6-12 breaths
- 0-6 breaths
- 18-24 breaths
- 12-18 breaths
Answer:
12-18 breaths