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3 years ago

Total number of electrons present in 1.8 grams of water is

Chemistry

1 answer:

Liono4ka [1.6K]3 years ago

5 0

1 mole of water = 18 grams (you can find this by finding mass of two hydrogen and one oxygen which is (1*2) + 16 = 18)

1.8 grams = 0.1 moles

1 H2O molecule has 10 electrons so 0.1 moles can be computed as:

(6.023*10^23)*(0.1)*10 = 6.023*10^23 electrons

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Answer:

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Explanation:

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Which sample contains more atoms: 3.89 g of nickel or 6.61 g of silver? defend your answer

Lubov Fominskaja [6]

Nickel contains more atoms.

Explanation:

Number of atoms is determined by the Avogadro number.

1 mole of substance contains 6.022 X 10²³ atoms.

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Number of moles of Ni = 3.89/58.6934g

Number of atoms of Ni = $\frac{3.89 X 6.022 X 10^2^3}{58.6934}$

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Molecular weight of Ag = 107.8682g

Number of moles of Ag = 6.61/107.8682

Number of atoms of Ag = $\frac{6.61 X 6.022 X 10^2^3}{107.8682}$

Number of atoms of Ag = 0.36 X 10²³

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