{"id":7140,"date":"2023-10-24T12:08:57","date_gmt":"2023-10-24T10:08:57","guid":{"rendered":"https:\/\/www.em-grade.com\/sem-categoria\/peso-molecular-pm-mw-e-fw\/"},"modified":"2023-10-24T12:08:57","modified_gmt":"2023-10-24T10:08:57","slug":"peso-molecular-pm-mw-e-fw","status":"publish","type":"post","link":"https:\/\/www.em-grade.com\/pt-pt\/definicoes-de-quimica\/peso-molecular-pm-mw-e-fw\/","title":{"rendered":"Peso molecular: PM, MW e FW"},"content":{"rendered":"<p>A massa molecular (MW) \u00e9 a massa de um mol de uma entidade qu\u00edmica. Por outras palavras, a massa molecular \u00e9 a soma das massas dos \u00e1tomos que constituem uma mol\u00e9cula. \u00c9 expressa em unidades de massa at\u00f3mica (a.m.u) ou Dalton (Da). No entanto, \u00e9 comum anot\u00e1-la sem unidades.   <\/p>\n<p>Estes dados s\u00e3o sistematicamente anotados nos frascos de p\u00f3, pois s\u00e3o essenciais para ajustar a molaridade de uma solu\u00e7\u00e3o. No entanto, existem v\u00e1rios acr\u00f3nimos para o peso molecular. Em portugu\u00eas, \u00e9 PM (Peso Molecular), enquanto que em ingl\u00eas \u00e9 MW (Molecular Weight) ou FW (Formula Weight).  <\/p>\n<p>A massa molecular pode ser utilizada para determinar a massa molar (M) de uma esp\u00e9cie qu\u00edmica. 1 a.m.u = 1Da = 1g.mol-1. Abaixo est\u00e1 um v\u00eddeo, do TheChemistryNinja, mostrando como calcular o peso molecular (ou massa molar).  <\/p>\n<p>&nbsp;<\/p>\n<p><iframe loading=\"lazy\" title=\"How to Calculate Molecular Weight from a Chemical Formula\" width=\"1080\" height=\"810\" src=\"https:\/\/www.youtube.com\/embed\/XonYVIQ7atg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A massa molecular (MW) \u00e9 a massa de um mol de uma entidade qu\u00edmica. Por outras palavras, a massa molecular \u00e9 a soma das massas dos \u00e1tomos que constituem uma&#8230;<\/p>\n","protected":false},"author":8,"featured_media":7141,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"itsec_x_frame_options":"","footnotes":""},"categories":[449],"tags":[644],"class_list":["post-7140","post","type-post","status-publish","format-standard","has-post-thumbnail","category-definicoes-de-quimica","tag-fw-pm-pt-pt"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/posts\/7140","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/comments?post=7140"}],"version-history":[{"count":0,"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/posts\/7140\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/media\/7141"}],"wp:attachment":[{"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/media?parent=7140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/categories?post=7140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.em-grade.com\/pt-pt\/wp-json\/wp\/v2\/tags?post=7140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}