A) C) electrons directo r y D) nutes dregte weerwyl E) none of the above 5.93...

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Question

science chemistry

Answer 1

Answer #1

34. Number of atoms = (given mass / molar mass) * Avogadro number = (given mass / molar mass) *(6.022*10²³ )

Given, mass = 58.93 g

Molar mass of cobalt = 58.93 g

Number of cobalt atoms that equal a mass of 58.93 g = (58.93 g / 58.93 g) * (6.022*10²³ )

= 1*6.022*10²³ = 6.022*10²³ atoms

35. Given, mass = 24.31 g

Molar mass of magnesium = 24.31 g

Number of magnesium atoms that equal a mass of 24.31 g = (24.31 g / 24.31 g) * (6.022*10²³)

= 1*6.022*10²³ = 6.022*10²³ atoms

36. All of the above equal to 1 mole of substance.

One mole of a substance is equal to 6.022*10²³ molecular entities (atoms,molecules,ions,formula units etc). Here,

6.02*10²³ sodium atoms is equal to 1 mole of Na atoms.

6.02*10²³ iodine molecules is equal to 1 mole of I₂ .

6.02*10²³ sodium iodide formula units is also equal to 1 mole.

So, the correct option is D-all of the above.

Answer 2

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