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3 years ago

When a atom gets smaller, what happens to the electronegativity ?

Chemistry

1 answer:

Alexus [3.1K]3 years ago

6 0

Answer:

Increases electronegativity.

Explanation:

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please help pls help 20 points Which of the following is a myth about water conservation? An important part of water conservatio

nordsb [41]

Answer:

Air-drying clothes conserves more water than using an electric clothes dryer.

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3 years ago

How many moles are in 5.60 x 10^23 atoms of Na? How many moles of H2 can be formed from this amount of Na?

alisha [4.7K]

Answer:

$\large \boxed{\text{A. 0.930 mol Na; B. 0.465 mol of H}_{2}}$

Explanation:

A. Moles of Na

1 mol Na atoms = 5.60 × 10²³ atoms of Na

$\text{Moles of Na } = 5.60 \times 10^{23} \text{ atoms Na} \times \dfrac{\text{1 mol Na}}{6.022 \times 10^{23}\text{ atoms Na}}\\\\= \text{0.930 mol Na}\\\text{There are $\large \boxed{\textbf{0.930 mol Na}}$ in 5.60 $\times 10^{23}$ atoms of Na.}$

B. Moles of hydrogen

You haven't given the equation for the reaction. However, we can write an equation

2Na + 2HX ⟶ 2NaX+ H₂

n/mol: 0.930

1 mol of H₂ is formed from 2 mol of Na

$\text{Moles of H}_{2} = \text{0.930 mol Na} \times \dfrac{\text{1 mol H}_{2}}{\text{2 mol Na}} = \textbf{0.465 mol H}_{2}\\\\\text{You can form $\large\boxed{\textbf{0.465 mol of H}_{2}}$}$

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3 years ago

Which traits did Meiolania have

dolphi86 [110]

Meiolania was the second largest known nonmarine turtle,surpassed only by "Megalochelys Atlas" from Asia.Which lived in the Pleistocene.

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3 years ago

UsingLewissymbolsandLewisstructures,diagramthefor- mation of SiCl4 from Si and Cl atoms, showing valence-shell electrons. (a) Ho

Maksim231197 [3]

Answer:

(a) 4

(b) 7

(d) 8

(e) 4

Explanation:

In order to draw the Lewis structure, we need to take into account the octet rule: atoms will share electrons to have 8 electrons in their valence shell.

(a) How many valence electrons does Si have initially?

Si has 4 valence electrons. It has to share 4 pairs of electrons to reach the octet.

(b) How many valence electrons does each Cl have initially?

Cl has 7 valence electrons. Each Cl has to share 1 pair of electrons to reach the octet.

(c) How many valence electrons surround the Si in the SiCl₄ molecule?

Si is surrounded by 8 electrons in SiCl₄.

(d) How many valence electrons surround each Cl in the SiCl₄ molecule?

Each Cl is surrounded by 8 electrons in SiCl₄.

(e) How many bonding pairs of electrons are in the SiCl₄ molecule?

There are 4 bonding pairs between Si and Cl.

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3 years ago

Can someone please explain to me the metallic bond?

Arlecino [84]

Metallic bond is the electrostatic attraction between a positive ion and delocalised(free)electrons

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3 years ago