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NNADVOKAT [17]
3 years ago
11

The mass of a single molybdenum atom is 1.59×10-22 grams. How many molybdenum atoms would there be in 40.6 milligrams of molybde

num?
Chemistry
1 answer:
iogann1982 [59]3 years ago
8 0

Answer:

2.55×10²⁰ atoms of Mo are contained in 40.6 mg

Explanation:

1 atom of Mo has a mass of 1.59×10⁻²² g

So let's think a rule of three for this question.

Firstly, we convert the mass in mg to g

40.6 mg / 1000 = 0.0406 g

In the mass of 1.59×10⁻²² g, there is 1 atom of Mo

In the mass of 0.0406 g there are (0.0406  / 1.59×10⁻²²) = 2.55×10²⁰ atoms

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Answer:

a. single replacement

Explanation:

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Cd + H₂SO₄    →    CdSO₄ + H₂

In given reaction Cd replace the hydrogen and form cadmium sulfate and hydrogen gas.

Single replacement:

It is the reaction in which one elements replace the other element in compound.

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Other options are incorrect because,

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In combustion reaction substances are burn in the presence of oxygen and form carbon dioxide and water.

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How do you figure out the number of electrons, neutrons, and protons of an element by only being given the mass?
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32.92 moles of Mg

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