Por favor, aguarde...Bem-vindo ao Olho na Quimica
Sejam BEM-VINDOS ao site mais enovador da web "Olho na Quimica".
Sobre a Quimica.
A Química é a ciência que estuda a constituição das moléculas, a sua estrutura, a sua interação umas com as outras, as suas propriedades e os métodos que permitem transformar essas moléculas em outras moléculas (reações químicas).
Considerando que tudo o que nos rodeia (vestuário, alimentos, medicamentos, eletrodomésticos, materiais de construção, etc.) é constituído por moléculas, conclui-se que a Química está presente na generalidade das atividades humanas e nos produtos daí result
Nossa equipe
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A tabela periódica dos elementos químicos é a disposição sistemática dos elementos, na forma de uma tabela, em função de suas propriedades. São muito úteis para se preverem as características e tendências dos átomos. Permite, por exemplo, prever o comportamento deátomos e...
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Paracelso
PARACELSO (1493- 1541)
O suíço Philippus Aureolus Theophrastus Bombastus Von Hohenheim, mais conhecido como Paracelso, era um conhecedor multifacetado. Ele estudou e escreveu sobre medicina e química, mas também sobre misticismo e filosofia. Foram as suas contribuições...
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P:Qual é o único elemento que vive na sombra?
R: O índio, pq fica em baixo do gálio!
------------------------
P: O que é "Cl - Cl - Cl - Cl" ?
R: É uma clorofila!
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P: Como um oxigênio se suicida?
R: Pula da ponte de hidrogênio!
------------------------
P: 2 ursos são...
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Experiencias de Quimica
Existem muitas experiência química umas fácil e outras mais complicadas por isso você que esta ansioso para fazer a sua experiência deve ter muito cuidado com estes produtos que são muito fortes onde você deve evitar o máximo de contato com a sua...
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www.youtube.com/watch?v=rRqbXuCB2BU
14
Cadernos Temáticos de Química Nova na Escola Ligações químicas N° 4 – Maio 2001
Introdução
A
partir do desenvolvimento da
mecânica quânt ica e da
r e s o l u ç ã o d a e q u a ç ã o d e
Schrödinger, compreendeu-se a...
Química Limpa
A química limpa tem como principal objetivo o desenvolvimento e a implementação de processos e produtos químicos para reduzir ou eliminar o uso ou a geração de substâncias nocivas à saúde humana e ao meio ambiente. Neste trabalho, foram...
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Datas Comemorativas
Janeiro
01 - Confraternização Universal/Dia Mundial da Paz.
06 -Dia de Reis
15- Dia Mundial do Compositor
21 · Dia Mundial da Religião
25 · Dia do Carteiro
30 · Dia da Saudade/Dia Nacional das Histórias em Quadrinhos
31 . Dia Mundial...
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Luta na Rússia
A Luta em Leningrado e na Criméia
O Cerco de Leningrado
O Cerco de Demiansk e Cholm
Luta na Criméia
O Caso Sponeck
Enquanto as unidades do...
A Evolução dos Modelos Atômicos
(Resumo)
Leucipo (450 a. C.)
(pensamento filosófico)
Leucipo viveu por volta de 450 a. C. (à 2.450 de anos atrás) e dizia que a matéria podia ser dividida em partículas cada vez menores, até chegar-se a um...
Aplicando pressão extrema ao elemento químico, pesquisadores do Max-Planck Institute criaram material ligeiramente maleável capaz de conduzir calor e eletricidade.
Dois pesquisadores do Max-Planck Institute afirmam que foram capazes de transformar o hidrogênio, elemento...
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23/04/2019
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The deck minus traditions is symbolic of a deeper cultural change at monetary firms
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Ukraine has overtaken Greece with ‘three-person baby’!
AlbertNaips
23/04/2019
“The inseparable right of a woman to become a mother with her own genetic material has become a reality,” the president of the Institute of Life in Athens said. He added: “We are very proud to announce international innovation in the field of assisted reproduction, and now we have the opportunity to make the birth of a child a reality for women with several unsuccessful attempts of artificial insemination”.
Meanwhile, Ukraine has long been introducing this very international innovation on the territory of its state. A third world country, as it is often called, is already successfully conducting a unique mitochondrial donation program in local human reproduction centers.
The mitochondrial donation procedure was the next step after donation of eggs and surrogacy. Now, even 40+ years old women have the opportunity to independently carry and give birth to genetically their child. Earlier, many have criticized surrogacy, claiming that it is the exploitation of the female body and the disparagement of honor and dignity of a woman. With mitochondria donation, a barren woman herself carries a baby. The donor only shares healthy mitochondria necessary for successful conception. But even here not everyone is satisfied with the ethical side of the issue.
Thus, some doctors from Britain claim that “the two spheres of application of this method - assistance in conceiving and avoiding transmission of a genetic disease - are very different from a moral point of view”. And therefore, they propose to apply the program only for patients with serious genetic diseases.
Ukraine decided not to dwell only on the genetic cause of childlessness, and successfully uses the method of mitochondrial donation for treatment 40+ women with infertility. Some European doctors believe that this technology may also increase the chances of artificial insemination. Ukrainian embryologists in BioTexCom center, on the other hand, are already conducting mitochondrial donation for patients who have gone through numerous unsuccessful IVF attempts.
To remind, the first “child from three parents” was born in Mexico. Why did the first such children appear not in New York, for example, but in Mexico City and Kyiv - in countries in which no one expected an innovation headship? The answer is simple: because in Mexico and Ukraine it is not prohibited, as for example, in the USA. That is why a team of American doctors traveled to Mexico to conduct such a program there.
The Greek team of doctors also worked together with the Spanish Embryology Center. The Ukrainian experts did everything themselves. They have all the necessary for this - equipment, legality of conducting programs using modern ART, and, most importantly, highly professional specialists in the field of embryology and gynecology.
Today, the global medical community is more focused on helping women with genetic diseases that can be transmitted to the fetus or affect its development and life. Ukrainian specialists, first of all, use mitochondrial donation in the struggle against infertility and the inability of women to carry a child due to mitochondria damage (low functional activity).
Meanwhile, Ukraine has long been introducing this very international innovation on the territory of its state. A third world country, as it is often called, is already successfully conducting a unique mitochondrial donation program in local human reproduction centers.
The mitochondrial donation procedure was the next step after donation of eggs and surrogacy. Now, even 40+ years old women have the opportunity to independently carry and give birth to genetically their child. Earlier, many have criticized surrogacy, claiming that it is the exploitation of the female body and the disparagement of honor and dignity of a woman. With mitochondria donation, a barren woman herself carries a baby. The donor only shares healthy mitochondria necessary for successful conception. But even here not everyone is satisfied with the ethical side of the issue.
Thus, some doctors from Britain claim that “the two spheres of application of this method - assistance in conceiving and avoiding transmission of a genetic disease - are very different from a moral point of view”. And therefore, they propose to apply the program only for patients with serious genetic diseases.
Ukraine decided not to dwell only on the genetic cause of childlessness, and successfully uses the method of mitochondrial donation for treatment 40+ women with infertility. Some European doctors believe that this technology may also increase the chances of artificial insemination. Ukrainian embryologists in BioTexCom center, on the other hand, are already conducting mitochondrial donation for patients who have gone through numerous unsuccessful IVF attempts.
To remind, the first “child from three parents” was born in Mexico. Why did the first such children appear not in New York, for example, but in Mexico City and Kyiv - in countries in which no one expected an innovation headship? The answer is simple: because in Mexico and Ukraine it is not prohibited, as for example, in the USA. That is why a team of American doctors traveled to Mexico to conduct such a program there.
The Greek team of doctors also worked together with the Spanish Embryology Center. The Ukrainian experts did everything themselves. They have all the necessary for this - equipment, legality of conducting programs using modern ART, and, most importantly, highly professional specialists in the field of embryology and gynecology.
Today, the global medical community is more focused on helping women with genetic diseases that can be transmitted to the fetus or affect its development and life. Ukrainian specialists, first of all, use mitochondrial donation in the struggle against infertility and the inability of women to carry a child due to mitochondria damage (low functional activity).
The discipline lex non scripta 'garden-variety law is symbolic of a deeper cultural transforming at budgetary firms
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Dia do Químico
18 DE JUNHO
A química faz parte da nossa vida há milhões de anos. Ramo da ciência que estuda as alterações e transformações sofridas pela matéria, incluindo solo, água, ar, poluentes, minerais e metais, bem como sua composição e propriedades. Desde a pré-história, o homem já acumulava conhecimentos práticos de química.
E quem está por trás desta ciência é o químico, realizando ensaios, experimentos, estudos e pesquisas para investigar as reações das substâncias.
O padeiro é um alquimista quando assa o pão, o viticultor quando prepara o vinho, o tecelão quando faz o tecido, portanto, seja quem for o responsável por tornar útil e levar ao ponto de ser usado pelo homem tudo o que cresce na natureza, é um Alquimista.
Ramo da ciência que estuda as alterações e transformações sofridas pela matéria, incluindo solo, água, ar, poluentes, minerais e metais, bem como sua composição e propriedades, a química faz parte da nossa vida há milhões de anos.
Provavelmente, um dos primeiros fenômenos, relacionado à química e observado por nossos antepassados, foi a produção do fogo. Seu domínio veio logo a seguir, no período paleolítico, há 400 mil anos.
E quem está por trás desta ciência é o químico, realizando ensaios, experimentos, estudos e pesquisas para investigar as reações das substâncias.
O QUE FAZ?
O profissional de química tem um vasto campo de atuação. Da indústria à universidade, pode atuar em diversas áreas, desde que conjugue capacidade de análise e concentração com interesse pelas ciências e facilidade para matemática.
O químico industrial, por exemplo, trabalha no controle de qualidade da produção, análise de materiais e dos produtos fabricados e pode pesquisar dados sobre a criação e o aperfeiçoamento de produtos.
Já na área de avaliação ambiental, o químico pode elaborar projetos de preservação do meio ambiente, bem como detectar substâncias e analisar possíveis danos à natureza causados por agentes poluentes.
E em instituições de ensino e pesquisa, pode lecionar ou desenvolver pesquisas que investigam processos e propriedades da química.
A CIÊNCIA DAS CIÊNCIAS
A alquimia é considerada uma das ciências mais antigas, tendo influenciado todas as demais.
Precursora da química, seu objetivo era compreender a natureza e reproduzir seus fenômenos para atingir um estado superior de consciência.
Em seus experimentos de laboratório, os alquimistas buscavam duas substâncias: a pedra filosofal, capaz de transformar metais em ouro, e o elixir da longa vida, capaz de prolongá-la indefinidamente.
Além de legarem à química a descoberta de substâncias e experiências químicas, os alquimistas deixaram receitas sobre como obter a pólvora e o álcool através da destilação do vinho. Supõe-se que elementos como o arsênio, antimônio, bismuto, fósforo e zinco também foram por eles descobertos.
Fonte: Instituto Brasileiro de Geografia e Estatística
Geral
Grupo 1
Grupo 10
Grupo 11
Grupo 12
Grupo 13
Grupo 14
Grupo 15
Grupo 16
Grupo 17
Grupo 18
Grupo 2
Grupo 3
Grupo 4
Grupo 5
Grupo 6
Grupo 7
Grupo 8
Grupo 9
Mapa
Quiz Onlinefechar
Questão 1:
(CARLOS CHAGAS) - Sabe-se que 0,16 mol de um elemento desconhecido pesa 35,4g. A massa atômica do elemento é igual a:
40u
180u
240u
300u
320u
Questão 2:
(FGV-SP) - Considere que a cotação de ouro seja R$ 11,40 por grama. Que quantidade de átomos de ouro, em mols, pode ser adquirida com R$ 9000,00?
Dado: massa molar do Au = 197g/mol.
2,0
2,5
3,0
3,4
4,0
Questão 3:
(UFAL) - Quantos mols de O2 estão presentes em 16g deste gás?
Dado: O = 16u
0,5
1,0
1,5
2,0
2,5
Questão 4:
(UNIP-SP) - Certo composto contém dois átomos do elemento A para cada três átomos de enxofre (massa atômica 32u). Sabendo-se que 15 gramas do composto contém 9,6 gramas de enxofre , pode-se afirmar que a massa atômica do elemento A é:
54u
27u
16u
35u
81u
Você é o visitante de número:
Contato
Olhonaquimica
kelvin.canguru@hotmail.com