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Lerok [7]
3 years ago
7

What information does the atomic number of an element provide?. A. the number of protons in one atom of the element. . B. the nu

mber of electrons in one atom of the element. . C.the number of neutrons in one atom of the element. . D. the total number of protons and neutrons in one atom of the element
Chemistry
2 answers:
Galina-37 [17]3 years ago
6 0
The correct answer for the given question above would be option A. The information that the atomic number of an element provides is the number of protons in one atom of the element. This also provides the chemical properties of an element as well as the total positive charges. 
shepuryov [24]3 years ago
5 0
D. the total number of protons and neutrons in a atom of the element. 
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A 0.595 g sample of a metal, M, reacts completely with sulfuric acid according to the reaction M ( s ) + H 2 SO 4 ( aq ) ⟶ MSO 4
zalisa [80]

Answer:

molar mass M(s) = 65.326 g/mol

Explanation:

  • M(s) + H2SO4(aq) → MSO4(aq) + H2(g)

∴ VH2(g) = 231 mL = 0.231 L

∴ P atm = 1.0079 bar

∴ PvH2O(25°C) = 0.03167 bar

Graham´s law:

⇒ PH2(g) = P atm - PvH2O(25°C)

⇒ PH2(g) = 1.0079 bar - 0.03167 bar = 0.97623 bar = 0.9635 atm

∴ nH2(g) = PV/RT

⇒ nH2(g) = ((0.9635 atm)(0.231 L))/((0.082 atmL/Kmol)(298 K))

⇒ nH2(g) = 9.1082 E-3 mol

⇒ n M(s) = ( 9.1082 E-3 mol H2(g) )(mol M(s)/mol H2(g))

⇒ n M(s) = 9.1082 E-3 mol

∴ molar mass M(s) [=] g/mol

⇒ molar mass M(s) =   (0.595 g) / (9.1082 E-3 mol)

⇒ molar mass M(s) = 65.326 g/mol

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2A(g) + B(l) ⇌ 3C(aq) + D(s)
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B

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The bonds S-S, O-H and Ca-Cl are, respectively, a) nonpolar covalent, polar covalent, ionic polar covalent, b)nonpolar covalent,
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Answer:

nonpolar covalent, polar covalent, ionic

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From the question ,

S - S Bond -

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Calcium is a metal , whereas , Chlorine is a non - metal , the bond is ionic in nature ,

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