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Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. [1] For use in broader applications, it is defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase : [2]
Very small (1.6×1.6×0.35 mm) red, green, and blue surface mount miniature LED package with gold wire bonding details. These are mostly single-die LEDs used as indicators, and they come in various sizes from 1.8 mm to 10 mm, through-hole and surface mount packages. [47] Typical current ratings range from around 1 mA to above 20 mA.
As of March 2023, more than 5.5 billion people had received one or more doses [130] (11.8 billion in total) in over 197 countries. The Oxford-AstraZeneca vaccine was the most widely used. [ 131 ] According to a June 2022 study, COVID-19 vaccines prevented an additional 14.4 million to 19.8 million deaths in 185 countries and territories from 8 ...
Freehold is a borough in and the county seat of Monmouth County, in the U.S. state of New Jersey. [18] [19] Known for its Victorian era homes and extensive colonial history, the borough is located in the Raritan Valley region within the New York metropolitan area, located about 33 miles (53 km) from Manhattan and 17 miles (27 km) from Staten Island.
Silicon makes up 27.2% of the Earth's crust by weight, second only to oxygen at 45.5%, with which it always is associated in nature. Further fractionation took place in the formation of the Earth by planetary differentiation: Earth's core, which makes up 31.5% of the mass of the Earth, has approximate composition Fe 25 Ni 2 Co 0.1 S
The 2020 census recorded Indonesia's population as 270.2 million, the fourth largest in the world, with a moderately high population growth rate of 1.25%. [5] Java is the world's most populous island, [241] where 56% of the country's population lives. [5]
Antarctica is a polar desert with little precipitation; the continent receives an average equivalent to about 150 mm (6 in) of water per year, mostly in the form of snow. The interior is dryer and receives less than 50 mm (2 in) per year, whereas the coastal regions typically receive more than 200 mm (8 in). [ 73 ]
The human immunodeficiency virus (HIV) [8] [9] [10] is a retrovirus [11] that attacks the immune system.It is a preventable disease. [5] It can be managed with treatment and become a manageable chronic health condition. [5]