Physics, 09.01.2021 14:00 tgraveslaylay2743

Mass of 2 x 1021 number of atoms of a element is 0.49. What is the mass of 0.5 mole of a b
element?

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Answer from: makaylaf16571

The mass of 0.5 mole of element ab is 81.67 g.

Explanation:

According to the mole concept, 1 mole of a substance contains $6.022 \times 10^{22}$ . As, the mass of $2 \times 10^{21}$ atoms is 0.49 g.

So, $\frac{2 \times 10^{21}}{6.022 \times 10^{23}} mol = 0.49 g$

0.003 mol = 0.49 g

Therefore, mass of 1 mole = $\frac{0.49}{0.003}$

= 163.33 g/mol

Hence, mass of 0.5 mole of ab element is calculated as follows.

$0.5 mol \times 163.33 g/mol$

= 81.67 g

Therefore, the mass of 0.5 mole of element ab is 81.67 g.

Answer from: Quest

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

Answer from: Quest

Acetic acid /əˈsiːtɪk/, systematically named ethanoic acid /ˌɛθəˈnoʊɪk/, is a colourless liquid organic compound with the chemical formula ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called glacial acetic acid. vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. it is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7 3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366 chemblchembl539 chemspider171 drugbankdb03166 echa infocard100.000.528ec number200-580-7e numbere260 (preservatives)gmelin reference1380iuphar/bps1058keggd00010 meshacetic+acidpubchem cid176rtecs numberaf1225000uniiq40q9n063p un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4) key: qtbsbxvteameqo-uhfffaoysa-n smilescc(o)=o

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Mass of 2 x 1021 number of atoms of a element is 0.49. What is the mass of 0.5 mole of a b
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