3 years ago

What orbital is represented by the transition metals in period four

1 answer:

8 0

The name transition metal refers to the position in the periodic table of elements. The transition elements represent the successive addition of electrons to the d atomic orbitals of the atoms. In this way, the transition metals represent the transition between group 2 (2A) elements and group 13 (3A) elements.

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Calculate how many moles of carbon dioxide are contained in 5.57 x 10²¹ molecules of CO₂

Alex777 [14]

<h2>Answer: 0.00925 mol </h2>

Explanation:

Moles = # of molecules ÷ Avogadro's Number

= (5.57 × 10²¹ molecules) ÷ (6.022 × 10²³ molecules/mol)

= 0.00925 mol

<h3>∴ the 5.57 x 10²¹ molecules of carbon dioxide ≡ 0.00925 mol</h3>

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2 years ago

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Marizza181 [45]

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2 years ago

A common radio wavelength observed coming from astronomical objects is 21 cm. What temperature is associated with this radiation

qaws [65]

Answer:

The temperature associated with this radiation is 0.014K.

Explanation:

If we assume that the astronomical object behaves as a black body, the relation between its <em>wavelength</em> and <em>temperature</em> is given by Wien's displacement law.

$\lambda_{max}=\frac{b}{T}$