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Hydrogen peroxide ( H2O2) is a nonplanar molecule with (twisted) C 2 symmetry; this was first shown by Paul-Antoine Giguère in 1950 using infrared spectroscopy. [9] [10] Although the O−O bond is a single bond, the molecule has a relatively high rotational barrier of 386 cm −1 (4.62 kJ / mol) for rotation between enantiomers via the trans ...
In 2022, about 20% of the Amazon rainforest has already been deforested and a further 6% was "highly degraded". Research suggests that upon reaching about 20–25% (hence 0–5% more), the tipping point to flip it into a non-forest ecosystem – degraded savannah – (in eastern, southern and central Amazonia) will be reached.
An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.
On January 5, 2023, Tatum put up his second career triple-double with 29 points, 14 rebounds, and 10 assists in a 124–95 victory over the Dallas Mavericks. On January 11, Tatum posted 31 points, 10 rebounds and four assists in a 125–114 victory over the New Orleans Pelicans. It was the tenth time that Tatum and Brown (41 points) combined to ...
March 7. Virginia, [149] Kansas, Missouri, and Washington, D.C. [150] announces its first cases. A new death is reported for March 7 in Washington. This brings the total confirmed U.S. deaths due to coronavirus to 19, 16 in Washington, 1 in California, and 2 in Florida.
Kenneth Cordele Griffin (born October 15, 1968) is an American hedge fund manager, entrepreneur and investor. He is the founder, chief executive officer, co- chief investment officer, and 80% owner of Citadel LLC, [1] [2] a multinational hedge fund. He also owns Citadel Securities, one of the largest market makers in the United States.