{"id":199043,"date":"2015-08-13T13:21:57","date_gmt":"2015-08-13T16:21:57","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/?p=199043"},"modified":"2015-10-06T13:25:28","modified_gmt":"2015-10-06T16:25:28","slug":"avogadros-number-recalculated","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/avogadros-number-recalculated\/","title":{"rendered":"Avogadro\u2019s number recalculated"},"content":{"rendered":"<div id=\"attachment_193545\" style=\"max-width: 300px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-193545\" src=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2015\/08\/Tecnociencia_JCR-Mana-Avogadro-300x225.jpg\" alt=\"Recalculated: this silicon sphere was used to increase the precision of a basic constant used in chemistry\" width=\"290\" height=\"217\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">Enrico Massa e Carlo Sasso \/INPM<\/span>Recalculated: this silicon sphere was used to increase the precision of a basic constant used in chemistry<span class=\"media-credits\">Enrico Massa e Carlo Sasso \/INPM<\/span><\/p><\/div>\n<p>Even if your school days are long past, you may still remember Avogadro\u2019s number: 6 x 10<sup>23<\/sup>.\u00a0 It is just an approximation, used to facilitate calculations during chemistry classes and exams.\u00a0 According to the most recent measurement of Avogadro\u2019s number, performed by researchers from Italy, Japan and Germany, the exact value is likely somewhere between 6.02214071 x 10<sup>23<\/sup>\u00a0and 6.02214093 x 10<sup>23<\/sup>\u00a0(<em><i>Journal of Physical and Chemical Reference Data<\/i><\/em>, July 2015).\u00a0 To determine these values, the team led by Giovanni Mana, from the National Institute of Metrological Research in Turin, Italy, developed a new method to precisely count every atom in a one-kilogram sphere of silicon-28.\u00a0 Chemists use Avogadro\u2019s number to compare masses of different substances and keep track of their chemical reactions, using a unit of measurement called the mole.<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers used a silicon sphere to recalculate the Avogadro\u2019s number","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[168],"tags":[259],"coauthors":[785],"class_list":["post-199043","post","type-post","status-publish","format-standard","hentry","category-technoscience","tag-chemistry"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/199043","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=199043"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/199043\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=199043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=199043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=199043"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=199043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}