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  2. Hydrochloric acid - Wikipedia

    en.wikipedia.org/wiki/Hydrochloric_acid

    Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungent smell.

  3. Copper - Wikipedia

    en.wikipedia.org/wiki/Copper

    Copper is the 26th most abundant element in Earth's crust, representing 50 ppm compared with 75 ppm for zinc, and 14 ppm for lead. [ 28 ] Typical background concentrations of copper do not exceed 1 ng/m 3 in the atmosphere; 150 mg/kg in soil; 30 mg/kg in vegetation; 2 μg/L in freshwater and 0.5 μg/L in seawater.

  4. Median lethal dose - Wikipedia

    en.wikipedia.org/wiki/Median_lethal_dose

    In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.

  5. Joint Service General Purpose Mask M-50/M-51 - Wikipedia

    en.wikipedia.org/wiki/Joint_Service_General...

    The lifetime ownership cost of the mask was reduced by 50% when compared with the M40 series mask due to a lower repair part count, all maintenance being completed at the operator and unit level and color coding of repair parts which decreased on-hand repair part inventory. [7] United States Marine Corps member is wearing a M50 mask

  6. Toyota Camry (XV50) - Wikipedia

    en.wikipedia.org/wiki/Toyota_Camry_(XV50)

    The Toyota Camry (XV50) is a mid-size car produced by Toyota from August 2011 to August 2020. Replacing the XV40 series, the XV50 represents the seventh generation of the Toyota Camry in all markets outside Japan, which follows a different generational lineage.

  7. Illinois - Wikipedia

    en.wikipedia.org/wiki/Illinois

    They built an urban complex of more than 100 platform and burial mounds, a 50-acre (20 ha) plaza larger than 35 football fields, [18] and a woodhenge of sacred cedar, all in a planned design expressing the culture's cosmology. Monks Mound, the center of the site, is the largest Pre-Columbian structure north of the Valley of Mexico.

  8. Ray Milland - Wikipedia

    en.wikipedia.org/wiki/Ray_Milland

    Ray Milland (born Alfred Reginald Jones; 3 January 1907 – 10 March 1986) was a Welsh-American actor and film director. [1] [2] He is often remembered for his portrayal of an alcoholic writer in Billy Wilder's The Lost Weekend (1945), which won him Best Actor at Cannes, a Golden Globe Award, and ultimately an Academy Award—the first such accolades for any Welsh actor.

  9. World War I - Wikipedia

    en.wikipedia.org/wiki/World_War_I

    Absolute figures are difficult to calculate due to differences in categorising expenditure since they often omit civilian infrastructure projects like railways which had logistical importance and military use. It is known, however, that from 1908 to 1913, military spending by the six major European powers increased by over 50% in real terms. [19]

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