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mafiozo [28]
3 years ago
8

Can someone please quickly answer this question?

Chemistry
1 answer:
dimulka [17.4K]3 years ago
3 0

Answer:

The difference between the two is:

[Kr]4d^1^05s^25p^2 is the Orbital Occupancy

[Kr]5s^24d^1^05p^2 is the Orbital Filling Order

Both are correct, I don't think your teacher will be so nit-picky to care.

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How atomic radius changes across a period and down a group in the periodic table?
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An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements. In general, the size of an atom will decrease as you move from left to the right of a certain period.

Explanation:

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As ________________ increases, air pressure decreases. A) pollution B) water vapor C) radiation D) altitude
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d or b

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In physical change the make up of matter is changedWho or false
Harrizon [31]

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False

That is a chemical change

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Read 2 more answers
When 20.0 g of KI are dissolved in 50.0 mL of distilled water in a calorimeter, the temperature drops from 24.0 °C to 19.0 °C. C
Reil [10]
<h2>Answer:</h2>

<em>8.67kJ/mol</em>

<h2>Explanations</h2>

The formula for calculating the amount of heat absorbed by the water is given as:

\begin{gathered} q=mc\triangle t \\ q=50\times4.18\frac{J}{g^oC}\times(19-24) \\ q=50\times4.18\times(-5) \\ q=-1045Joules \\ q=-1.045kJ \end{gathered}

Determine the moles of KI

\begin{gathered} moles\text{ of KI}=\frac{mass\text{ of KI}}{molar\text{ mass of KI}} \\ moles\text{ of KI}=\frac{20g}{166g\text{/mol}} \\ moles\text{ of KI}=0.1205moles \end{gathered}

Since heat is lost, hence the enthalpy change of the solution will be negative that is:

\begin{gathered} \triangle H=-q \\ \triangle H=-(-1.045kJ) \\ \triangle H=1.045kJ \end{gathered}

Determine the enthalpy of solution in kJ•mol-1

\begin{gathered} \triangle H_{diss}=\frac{1.045kJ}{0.1205mole} \\ \triangle H_{diss}\approx8.67kJmol^{-1} \end{gathered}

Hence the enthalpy of solution in kJ•mol-1 for KI is 8.67kJ/mol

4 0
1 year ago
An element has an atomic weight of 137 g/mol and a BCC crystal structure. If the volume density of the element is 2.2 g/cm3 what
kap26 [50]

Explanation:

Below is an attachment containing the solution to the question.

7 0
3 years ago
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