Context and question: In 1860, Montevideo had 57,913 inhabitants including a number of people of African origin who had been brought as slaves and had gained their freedom around the middle of the century. By 1880, the population had quadrupled, mainly because of the great European immigration. In 1908, its population had grown massively to 309,331 inhabitants. In the course of the 20th century the city continued to receive large numbers of European immigrants, especially Spanish and Italian, followed by French, Germans or Dutch, English or Irish, Polish, Greek, Hungarians, Russians, Croats, Lebanese, Armenians, and Jews of various origins. The last wave of immigrants occurred between 1945 and 1955.
The population quadrupled by 1880 due mainly to what?
Answer: the great European immigration
Context and question: Salts of many oxidation states of uranium are water-soluble and may be studied in aqueous solutions. The most common ionic forms are U3+ (brown-red), U4+ (green), UO+
2 (unstable), and UO2+
2 (yellow), for U(III), U(IV), U(V), and U(VI), respectively. A few solid and semi-metallic compounds such as UO and US exist for the formal oxidation state uranium(II), but no simple ions are known to exist in solution for that state. Ions of U3+ liberate hydrogen from water and are therefore considered to be highly unstable. The UO2+
2 ion represents the uranium(VI) state and is known to form compounds such as uranyl carbonate, uranyl chloride and uranyl sulfate. UO2+
2 also forms complexes with various organic chelating agents, the most commonly encountered of which is uranyl acetate.
What state isn't represented by the UO2+ 2 ion?
Answer: unanswerable
Context and question: During 1889, Thomas Edison had business interests in many electricity-related companies: Edison Lamp Company, a lamp manufacturer in East Newark, New Jersey; Edison Machine Works, a manufacturer of dynamos and large electric motors in Schenectady, New York; Bergmann & Company, a manufacturer of electric lighting fixtures, sockets, and other electric lighting devices; and Edison Electric Light Company, the patent-holding company and the financial arm backed by J.P. Morgan and the Vanderbilt family for Edison's lighting experiments. In 1889, Drexel, Morgan & Co., a company founded by J.P. Morgan and Anthony J. Drexel, financed Edison's research and helped merge those companies under one corporation to form Edison General Electric Company which was incorporated in New York on April 24, 1889. The new company also acquired Sprague Electric Railway & Motor Company in the same year.
In what city was Bergmann & Company headquartered?
Answer:
unanswerable