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pickupchik [31]

3 years ago

12

If an element has 2 valence electrons, how many dots will be in the elements dot diagram?

2 answers:

antiseptic1488 [7]3 years ago

6 0

Well since we're doing the Lewis dot diagram do you know which element on the table that it is?

kherson [118]3 years ago

3 0

Atomic Structure<span> Links His method rests upon focusing on the </span>valence electrons<span> of the </span>elements<span>. The first </span>2 valence electron<span> go together (I was taught to place them on top), </span>If<span> you </span>have<span> 5 </span>valence electrons<span> as Nitrogen </span>does<span>, stop after 5 </span>dots<span>. So it looks like this, depending on how </span>many valence electrons<span> we </span>have<span>.</span>

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3 years ago

How can you increase the momentum of an object

Olin [163]

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3 years ago

What mass of ice (in g) can be melted if 27.2 kJ of thermal energy are added at the freezing point? Use molar mass = 18.02 g/mol

san4es73 [151]

Answer : The mass of ice melted can be, 3.98 grams.

Explanation :

First we have to calculate the moles of ice.

$Q=\frac{\Delta H}{n}$

where,

Q = energy absorbed = 27.2 kJ

$\Delta H$ = enthalpy of fusion of ice = 6.01 kJ/mol

n = moles = ?

Now put all the given values in the above expression, we get:

$27.2kJ=\frac{6.01kJ/mol}{n}$

$n=0.221mol$

Now we have to calculate the mass of ice.

$\text{Mass of ice}=\text{Moles of ice}\times \text{Molar mass of ice}$

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$\text{Mass of ice}=0.221mol\times 18.02g/mol=3.98g$

Thus, the mass of ice melted can be, 3.98 grams.

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4 years ago