Q: Answer the following question given this paragraph: Sulfuric acid is the industrial chemical produced in greatest quantity worldwide. About 90 billion pounds are produced each year in the United States alone. Write the Lewis structure for sulfuric acid, H2SO4, which has two oxygen atoms and two OH groups bonded to the sulfur. 7.5 Strengths of Ionic and Covalent Bonds 64. Which bond in each of the following pairs of bonds is the strongest? (a) CC or C = C (b) CN or C N (c) C O or C = O (d) HF or HCl (e) CH or OH (f) CN or CO 65. Using the bond energies in Table 7.2, determine the approximate enthalpy change for each of the following reactions: (a) H 2(g) + Br 2(g) 2HBr(g) (b) CH 4(g) + I 2(g) CH 3 I(g) + HI(g) (c) C 2 H 4(g) + 3O 2(g) 2CO 2(g) + 2H 2 O(g) 66. Using the bond energies in Table 7.2, determine the approximate enthalpy change for each of the following reactions: (a) Cl 2(g) + 3F 2(g) 2ClF 3(g) (b) H 2 C = CH 2(g) + H 2(g) H 3 CCH 3(g) (c) 2C 2 H 6(g) + 7O 2(g) 4CO 2(g) + 6H 2 O(g) 67. When a molecule can form two different structures, the structure with the stronger bonds is usually the more stable form. Use bond energies to predict the correct structure of the hydroxylamine molecule:. Q: What is the industrial chemical produced in greatest quantity worldwide? A:

OPTIONS:
- gaseous acid
- liquid acid
- boric acid
- sulfuric acid

A: sulfuric acid

input: OPTIONS:
- gravitational pull
- atmospheric pressure
- spontaneous combustion
- friction with atmosphere Now, answer this question: Answer the following question given this paragraph: A meteoroid is dragged toward Earth by gravity and enters the atmosphere. Friction with the atmosphere heats the object quickly, so it starts to vaporize. As it flies through the atmosphere, it leaves a trail of glowing gases. The object is now a meteor. Most meteors vaporize in the atmosphere. They never reach Earth's surface. Large meteoroids may not burn up entirely in the atmosphere. A small core may remain and hit Earth's surface. This is called a meteorite . Q: What causes a meteoroid to vaporize after it enters the atmosphere? A:
A:
output: friction with atmosphere

Answer the following question given this paragraph: Images in a plane mirror are reversed left and right but not reversed top and bottom. Q: Images in what type of mirror are reversed left and right but not reversed top and bottom? A:

OPTIONS:
- concave
- virtual
- convex
- plane mirror

Answer: plane mirror

Problem: OPTIONS:
- six
- two
- four
- three
Q: Answer the following question given this paragraph: Pluto has three moons of its own. The largest, Charon, is big compared to Pluto. The Pluto-Charon system is sometimes called a double dwarf planet ( Figure above ). Two smaller moons, Nix and Hydra, were discovered in 2005. Q: How many moons does pluto have? A:
Answer: three

Problem:OPTIONS:
- membranes
- cartilage
- veins
- tendons

Answer the following question given this paragraph: 11.1 | Interactions of Skeletal Muscles, Their Fascicle Arrangement, and Their Lever Systems By the end of this section, you will be able to: Compare and contrast agonist and antagonist muscles Describe how fascicles are arranged within a skeletal muscle Explain the major events of a skeletal muscle contraction within a muscle in generating force To move the skeleton, the tension created by the contraction of the fibers in most skeletal muscles is transferred to the tendons. The tendons are strong bands of dense, regular connective tissue that connect muscles to bones. The bone connection is why this muscle tissue is called skeletal muscle. Q: Strong bands of dense, regular connective tissue that connect muscles to bones are called what? A:
****
A: tendons

Problem:OPTIONS:
- homeostasis
- a ditch
- a holding tank
- a reservoir

Answer the following question given this paragraph: Part of a cycle that holds an element or water for a long period of time is called a reservoir . The ocean is a reservoir for water. The deep ocean may hold water for thousands of years. Q: What is part of a cycle that holds an element or water for a long period of time called? A:
****
A:
a reservoir