Problem: Roughly one quarter of all zinc output in the United States (2009), is consumed in the form of zinc compounds; a variety of which are used industrially. Zinc oxide is widely used as a white pigment in paints, and as a catalyst in the manufacture of rubber. It is also used as a heat disperser for the rubber and acts to protect its polymers from ultraviolet radiation (the same UV protection is conferred to plastics containing zinc oxide). The semiconductor properties of zinc oxide make it useful in varistors and photocopying products. The zinc zinc-oxide cycle is a two step thermochemical process based on zinc and zinc oxide for hydrogen production.
What kind of zinc compound is used in manufacturing rubber?
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Answer: Zinc oxide

Problem: Both Roger Williams and John Clarke, his compatriot and coworker for religious freedom, are variously credited as founding the earliest Baptist church in North America. In 1639, Williams established a Baptist church in Providence, Rhode Island, and Clarke began a Baptist church in Newport, Rhode Island. According to a Baptist historian who has researched the matter extensively, "There is much debate over the centuries as to whether the Providence or Newport church deserved the place of 'first' Baptist congregation in America. Exact records for both congregations are lacking."
Who founded the earliest Baptist church in North America?
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Answer: Roger Williams and John Clarke

Problem: At the very end of the 19th century, a new style, with a carved top and back construction inspired by violin family instruments began to supplant the European-style bowl-back instruments in the United States. This new style is credited to mandolins designed and built by Orville Gibson, a Kalamazoo, Michigan luthier who founded the "Gibson Mandolin-Guitar Manufacturing Co., Limited" in 1902. Gibson mandolins evolved into two basic styles: the Florentine or F-style, which has a decorative scroll near the neck, two points on the lower body and usually a scroll carved into the headstock; and the A-style, which is pear shaped, has no points and usually has a simpler headstock.
What sytle did the new style of mandolins supplant?
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Answer:
European-style bowl-back